Description of problem:
Trying to install websocket proxy on separate host using master repo:

# yum install ovirt-engine-websocket-proxy -y
# engine-setup

using OTOPIDEBUG=1:

***L:ERROR Internal error: No module named engine
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/otopi/__main__.py", line 88, in main
    installer.execute()
  File "/usr/lib/python2.7/site-packages/otopi/main.py", line 153, in execute
    sys.exc_info()[2],
  File "/usr/lib/python2.7/site-packages/otopi/util.py", line 81, in raiseExceptionInformation
    exec('raise info[1], None, info[2]')
  File "/usr/lib/python2.7/site-packages/otopi/main.py", line 147, in execute
    self.context.loadPlugins()
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 798, in loadPlugins
    self._loadPluginGroups(plugindir, needgroups, loadedgroups)
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 113, in _loadPluginGroups
    self._loadPlugins(path, path, groupname)
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 70, in _loadPlugins
    self._loadPlugins(base, d, groupname)
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 101, in _loadPlugins
    os.path.basename(path),
  File "/usr/lib/python2.7/site-packages/otopi/util.py", line 105, in loadModule
    mod_desc
  File "/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/websocket_proxy/__init__.py", line 24, in <module>
    from . import config
  File "/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/websocket_proxy/config.py", line 31, in <module>
    from ovirt_engine_setup.engine import constants as oenginecons
PluginLoadException: No module named engine