Bug 1560461

Description of problem:
Virt-who crashes, when there is no option "owner" in configuration file for RHEVM hypervisor.

Version-Release number of selected component (if applicable):
virt-who: 0.21.2-1

How reproducible:
always

Steps to Reproduce:
1. Create following configuration file (e.g.: /root/rhevm4.conf) on your system:

[rhevm4]
type=rhevm
server=https://your.rhevm.somewhere.com:443/ovirt-engine/
username=user@foo
password=secret
owner=admin

2. Register the system using subscription-manager to candlepin server

3. Verify that you are able to report guest-to-host mapping from your RHEVM hypervisor to candlepin server:

[root@localhost ~]# virt-who -d -o -c /root/rhevm4.conf

4. Comment owner option from: /root/rhevm4.conf

[rhevm4]
type=rhevm
server=https://your.rhevm.somewhere.com:443/ovirt-engine/
username=user@foo
password=secret
#owner=admin <====== Commented owner

5. Try to run virt-who again:

[root@localhost ~]# virt-who -d -o -c /root/rhevm4.conf

Actual results:

[root@localhost ~]# virt-who -d -o -c /root/rhevm4.conf 
2018-03-26 10:27:23,887 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:all_drop_dir_config_sections:1272 - Configuration directory '/etc/virt-who.d/' appears empty
2018-03-26 10:27:23,888 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "interval" not set, using default: 3600
2018-03-26 10:27:23,888 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "log_per_config" not set, using default: False
2018-03-26 10:27:23,888 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "print_" not set, using default: False
2018-03-26 10:27:23,888 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "reporter_id" not set, using default: localhost.localdomain-1b4147c762254fafae65f754dc1eabc5
2018-03-26 10:27:23,888 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "log_dir" not set, using default: /var/log/rhsm
2018-03-26 10:27:23,889 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [global]: Value for "log_file" not set, using default: rhsm.log
2018-03-26 10:27:23,889 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [rhevm4]: Value for "hypervisor_id" not set, using default: uuid
2018-03-26 10:27:23,889 [virtwho.rhsm_log WARNING] MainProcess(22945):MainThread @config.py:init_config:1434 - [rhevm4]: Value for "is_hypervisor" not set, using default: True
2018-03-26 10:27:23,889 [virtwho.rhsm_log DEBUG] MainProcess(22945):MainThread @executor.py:__init__:54 - Using config named 'rhevm4'
2018-03-26 10:27:23,889 [virtwho.rhsm_log INFO] MainProcess(22945):MainThread @main.py:main:159 - Using configuration "rhevm4" ("rhevm" mode)
2018-03-26 10:27:23,889 [virtwho.rhsm_log INFO] MainProcess(22945):MainThread @main.py:main:161 - Using reporter_id='localhost.localdomain-1b4147c762254fafae65f754dc1eabc5'
2018-03-26 10:27:23,892 [rhsm.https DEBUG] MainProcess(22945):MainThread @https.py:<module>:56 - Using standard libs to provide httplib and ssl
2018-03-26 10:27:23,897 [virtwho.main DEBUG] MainProcess(22945):Thread-2 @virt.py:run:378 - Thread 'rhevm4' started
2018-03-26 10:27:32,160 [virtwho.main INFO] MainProcess(22945):Thread-2 @virt.py:_send_data:929 - Report for config "rhevm4" gathered, placing in datastore
2018-03-26 10:27:32,164 [virtwho.main DEBUG] MainProcess(22945):Thread-2 @virt.py:run:397 - Thread 'rhevm4' terminated
2018-03-26 10:27:32,909 [virtwho.destination_4499800964655798746 DEBUG] MainProcess(22945):Thread-3 @virt.py:run:378 - Thread 'destination_4499800964655798746' started
2018-03-26 10:27:32,911 [virtwho.destination_4499800964655798746 ERROR] MainProcess(22945):Thread-3 @virt.py:run:392 - Thread 'destination_4499800964655798746' fails with exception:
Traceback (most recent call last):
  File "virtwho/virt/virt.py", line 383, in run
    self._run()
  File "virtwho/virt/virt.py", line 339, in _run
    self._send_data(data_to_send)
  File "virtwho/virt/virt.py", line 578, in _send_data
    self.config['owner'] = report.config['owner']
  File "virtwho/config.py", line 552, in __getitem__
    raise KeyError('{0} not in {1}'.format(key, self.name))
KeyError: 'owner not in rhevm4'
2018-03-26 10:27:32,914 [virtwho.destination_4499800964655798746 INFO] MainProcess(22945):Thread-3 @virt.py:_send_data:557 - Error report received
2018-03-26 10:27:32,914 [virtwho.destination_4499800964655798746 DEBUG] MainProcess(22945):Thread-3 @virt.py:run:406 - Thread 'destination_4499800964655798746' stopped after running once
2018-03-26 10:27:33,913 [virtwho.main DEBUG] MainProcess(22945):MainThread @__main__.py:main:25 - virt-who terminated
2018-03-26 10:27:33,913 [virtwho.main DEBUG] MainProcess(22945):MainThread @executor.py:terminate:224 - virt-who is shutting down

Expected results:

Virt-who should check for owner option. When the option is not available, then it should print some error message and virt-who should be properly terminated.

Additional info: