Description of problem:
OSP10 -> OSP11 upgrade fails when Nova services are running on a standalone role. 

roles_data file:
http://paste.openstack.org/show/600798/

Upgrade fails during major-upgrade-composable-steps.yaml with the following error:

stdout: overcloud.AllNodesDeploySteps.ControllerUpgrade_Step2:
  resource_type: OS::Heat::SoftwareDeploymentGroup
  physical_resource_id: 170d8e1d-58e0-4720-8149-a9fd4f2b9e1d
  status: CREATE_FAILED
  status_reason: |
    CREATE aborted
overcloud.AllNodesDeploySteps.NovacontrolUpgrade_Step5.0:
  resource_type: OS::Heat::SoftwareDeployment
  physical_resource_id: 5cf72dbf-9b22-4f63-8b98-25061864df35
  status: CREATE_FAILED
  status_reason: |
    Error: resources[0]: Deployment to server failed: deploy_status_code : Deployment exited with non-zero status code: 2
  deploy_stdout: |
    ...
    TASK [Run puppet apply to set tranport_url in nova.conf] ***********************
    changed: [localhost]
    
    TASK [Setup cell_v2 (map cell0)] ***********************************************
    fatal: [localhost]: FAILED! => {"changed": true, "cmd": ["nova-manage", "cell_v2", "map_cell0"], "delta": "0:02:12.569490", "end": "2017-02-28 15:41:23.802908", "failed": true, "rc": 1, "start": "2017-02-28 15:39:11.233418", "stderr": "", "stdout": "An error has occurred:
Traceback (most recent call last):
  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1594, in main
    ret = fn(*fn_args, **fn_kwargs)
  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1140, in map_cell0
    self._map_cell0(database_connection=database_connection)
  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1170, in _map_cell0
    cell_mapping.create()
  File \"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py\", line 226, in wrapper
    return fn(self, *args, **kwargs)
  File \"/usr/lib/python2.7/site-packages/nova/objects/cell_mapping.py\", line 71, in create
    db_mapping = self._create_in_db(self._context, self.obj_get_changes())
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 893, in wrapper
    with self._transaction_scope(context):
  File \"/usr/lib64/python2.7/contextlib.py\", line 17, in __enter__
    return self.gen.next()
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 944, in _transaction_scope
    allow_async=self._allow_async) as resource:
  File \"/usr/lib64/python2.7/contextlib.py\", line 17, in __enter__
    return self.gen.next()
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 558, in _session
    bind=self.connection, mode=self.mode)
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 317, in _create_session
    self._start()
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 403, in _start
    engine_args, maker_args)
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 427, in _setup_for_connection
    sql_connection=sql_connection, **engine_kwargs)
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py\", line 155, in create_engine
    test_conn = _test_connection(engine, max_retries, retry_interval)
  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py\", line 339, in _test_connection
    six.reraise(type(de_ref), de_ref)
  File \"<string>\", line 2, in reraise
DBConnectionError: (pymysql.err.OperationalError) (2003, \"Can't connect to MySQL server on '172.17.1.13' ([Errno 113] EHOSTUNREACH)\")", "stdout_lines": ["An error has occurred:", "Traceback (most recent call last):", "  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1594, in main", "    ret = fn(*fn_args, **fn_kwargs)", "  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1140, in map_cell0", "    self._map_cell0(database_connection=database_connection)", "  File \"/usr/lib/python2.7/site-packages/nova/cmd/manage.py\", line 1170, in _map_cell0", "    cell_mapping.create()", "  File \"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py\", line 226, in wrapper", "    return fn(self, *args, **kwargs)", "  File \"/usr/lib/python2.7/site-packages/nova/objects/cell_mapping.py\", line 71, in create", "    db_mapping = self._create_in_db(self._context, self.obj_get_changes())", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 893, in wrapper", "    with self._transaction_scope(context):", "  File \"/usr/lib64/python2.7/contextlib.py\", line 17, in __enter__", "    return self.gen.next()", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 944, in _transaction_scope", "    allow_async=self._allow_async) as resource:", "  File \"/usr/lib64/python2.7/contextlib.py\", line 17, in __enter__", "    return self.gen.next()", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 558, in _session", "    bind=self.connection, mode=self.mode)", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 317, in _create_session", "    self._start()", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 403, in _start", "    engine_args, maker_args)", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py\", line 427, in _setup_for_connection", "    sql_connection=sql_connection, **engine_kwargs)", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py\", line 155, in create_engine", "    test_conn = _test_connection(engine, max_retries, retry_interval)", "  File \"/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py\", line 339, in _test_connection", "    six.reraise(type(de_ref), de_ref)", "  File \"<string>\", line 2, in reraise", "DBConnectionError: (pymysql.err.OperationalError) (2003, \"Can't connect to MySQL server on '172.17.1.13' ([Errno 113] EHOSTUNREACH)\")"], "warnings": []}
    	to retry, use: --limit @/var/lib/heat-config/heat-config-ansible/b106b80f-8c24-4896-98d3-06ddf74f7508_playbook.retry



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Deploy OSP10 overcloud with a standalone running nova control plane services
2. Upgrade OSP10 to OSP11

Actual results:
Upgrade fails while running Setup cell_v2 (map cell0) step.

Expected results:
Upgrade succeeds.

Additional info:
172.17.1.13 is the internal API VIP but it cannot be reached because the cluster is not running when this step is run.