Description of problem:
To upgrade a hosted engine environment I followed:
    http://www.ovirt.org/Hosted_Engine_Howto#Upgrade_Hosted_Engine
The 5th step says:
     Restart ha-agent and broker services(# service ovirt-ha-broker restart && service ovirt-ha-agent restart)

which translates to:
    systemctl restart ovirt-ha-broker 
    systemctl restart ovirt-ha-agent

However, after doing that, the daemons are not running and systemctl
shows:
    [root@dev-20 ~]# systemctl status ovirt-ha-broker
    ovirt-ha-broker.service - oVirt Hosted Engine High Availability Communications Broker
       Loaded: loaded (/usr/lib/systemd/system/ovirt-ha-broker.service; enabled)
       Active: inactive (dead) since Wed 2014-07-30 13:55:19 CEST; 2min 44s ago
      Process: 26794 ExecStop=/lib/systemd/systemd-ovirt-ha-broker stop (code=exited, status=0/SUCCESS)
      Process: 26786 ExecStart=/lib/systemd/systemd-ovirt-ha-broker start (code=exited, status=0/SUCCESS)
     Main PID: 861 (code=killed, signal=KILL)

    Jul 30 13:55:19 dev-20.rhev.lab.eng.brq.redhat.com systemd[1]: Starting oVirt Hosted Engine High Availability Co......
    Jul 30 13:55:19 dev-20.rhev.lab.eng.brq.redhat.com systemd-ovirt-ha-broker[26794]: Stopping ovirt-ha-broker: [FAILED]
    Jul 30 13:55:19 dev-20.rhev.lab.eng.brq.redhat.com systemd[1]: Started oVirt Hosted Engine High Availability Com...er.
    Hint: Some lines were ellipsized, use -l to show in full.
    [root@dev-20 ~]# ps aux | grep ovirt

The only way to get the daemons up and running again was to bypass systemd and
do:
    /lib/systemd/systemd-ovirt-ha-broker restart
    /lib/systemd/systemd-ovirt-ha-agent restart


After doing that, the --vm-status shows that the data is stale though (possibly
unrelated)

    --== Host 2 status ==--

    Status up-to-date                  : False
    Hostname                           : 10.34.63.180
    Host ID                            : 2
    Engine status                      : unknown stale-data
    Score                              : 2000
    Local maintenance                  : False
    Host timestamp                     : 1406640293
    Extra metadata (valid at timestamp):
         metadata_parse_version=1
         metadata_feature_version=1
         timestamp=1406640293 (Tue Jul 29 15:24:53 2014)
         host-id=2
         score=2000
         maintenance=False
         bridge=True
         cpu-load=0.0856
         engine-health={"health": "good", "vm": "up", "detail": "up"}
         gateway=True
         mem-free=3192

Version-Release number of selected component (if applicable):
ovirt-hosted-engine-ha-1.2.1-0.2.master.20140725101556.fc20.noarch

How reproducible:
I only have one setup, so I did it once


Steps to Reproduce:
1. Follow the guide above
2. Try to do step 7 hosted-engine --set-maintenance --mode=none

Actual results:
    [root@dev-20 ~]# hosted-engine --set-maintenance --mode=none
    Traceback (most recent call last):
      File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
        "__main__", fname, loader, pkg_name)
      File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
        exec code in run_globals
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py", line 72, in <module>
        if not maintenance.set_mode(sys.argv[1]):
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py", line 60, in set_mode
        value=m_global,
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 248, in set_maintenance_mode
        str(value))
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py", line 196, in set_global_md_flag
        with broker.connection():
      File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
        return self.gen.next()
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 99, in connection
        self.connect()
      File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 78, in connect
        raise BrokerConnectionError(error_msg)
    ovirt_hosted_engine_ha.lib.exceptions.BrokerConnectionError: Failed to connect to broker, the number of errors has exceeded the limit (5)

Expected results:
It silently succeeds


Additional info:

Above I put how to workaround the error by bypassing systemd, but the results
are not optimal with the workaround