Description of problem:
host-deploy fails if python34 is installed on Centos 7 host

The error is:
2019-03-14 14:33:54,481+01 ERROR [org.ovirt.engine.core.bll.hostdeploy.VdsDeployBase] (EE-ManagedThreadFactory-engine-Thread-1) [636025ac] Error during host c75he20190311h1 install
2019-03-14 14:33:54,494+01 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-1) [636025ac] EVENT_ID: VDS_INSTALL_IN_PROGRESS_ERROR(511), An error has occurred during installation of Host c75he20190311h1: Unexpected error during execution: Traceback (most recent call last):
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/main.py", line 141, in execute
    self.context.loadPlugins()
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 769, in loadPlugins
    self._loadPluginGroups(plugindir, needgroups, loadedgroups)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 112, in _loadPluginGroups
    self._loadPlugins(path, path, groupname)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 69, in _loadPlugins
    self._loadPlugins(base, d, groupname)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 100, in _loadPlugins
    os.path.basename(path),
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/util.py", line 107, in loadModule
    module = importlibutil.module_from_spec(spec)
AttributeError: 'module' object has no attribute 'module_from_spec'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/__main__.py", line 83, in main
    installer.execute()
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/main.py", line 147, in execute
    sys.exc_info()[2],
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/util.py", line 84, in raiseExceptionInformation
    raise info[1].with_traceback(info[2])
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/main.py", line 141, in execute
    self.context.loadPlugins()
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 769, in loadPlugins
    self._loadPluginGroups(plugindir, needgroups, loadedgroups)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 112, in _loadPluginGroups
    self._loadPlugins(path, path, groupname)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 69, in _loadPlugins
    self._loadPlugins(base, d, groupname)
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/context.py", line 100, in _loadPlugins
    os.path.basename(path),
  File "/tmp/ovirt-CYhPU8MZxg/pythonlib/otopi/util.py", line 107, in loadModule
    module = importlibutil.module_from_spec(spec)
otopi.main.PluginLoadException: 'module' object has no attribute 'module_from_spec'
.
2019-03-14 14:33:54,494+01 ERROR [org.ovirt.engine.core.bll.hostdeploy.VdsDeployBase] (EE-ManagedThreadFactory-engine-Thread-1) [636025ac] Error during host c75he20190311h1 install, preferring first exception: Unexpected connection termination
2019-03-14 14:33:54,494+01 ERROR [org.ovirt.engine.core.bll.hostdeploy.InstallVdsInternalCommand] (EE-ManagedThreadFactory-engine-Thread-1) [636025ac] Host installation failed for host '3d759c1b-4cac-4da4-bed0-d1cf895ae5ef', 'c75he20190311h1': Unexpected connection termination


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


How reproducible:
100%

Steps to Reproduce:
1. install python34
2. try to deploy the host from the engine
3.

Actual results:
otopi.main.PluginLoadException: 'module' object has no attribute 'module_from_spec'

Maybe an otopi issue with python 3

Expected results:
Successful deployment

Additional info: