Created attachment 885452 [details]
deploy log

Description of problem:
If user tries to install host with external provider support and leaves 
"Bridge Mappings" field in Install Host -> Network Provider empty

Installation fails with following error: 
Failed to install Host neseted_host_1. Failed to execute stage 'Misc configuration': list index out of range.

2014-04-11 15:20:38 DEBUG otopi.context context._executeMethod:152 method exception
Traceback (most recent call last):
  File "/tmp/ovirt-ZCg95XYwmz/pythonlib/otopi/context.py", line 142, in _executeMethod
    method['method']()
  File "/tmp/ovirt-ZCg95XYwmz/otopi-plugins/ovirt-host-deploy/openstack/neutron_openvswitch.py", line 193, in _bridge
    bridge = setting.split(':')[1]
IndexError: list index out of range
2014-04-11 15:20:38 ERROR otopi.context context._executeMethod:161 Failed to execute stage 'Misc configuration': list index out of range


Version-Release number of selected component (if applicable):
Red Hat Enterprise Virtualization Manager Version: 3.4.0-0.13.beta3.el6ev 

How reproducible:
100%

Steps to Reproduce:
1. Add external Neutron Provided with Open vSwithch plugin
2. add RHOS repo to host 
3. Hosts -> New -> General -> fill in name, address, password
4. Stay in the dialog "New Host" switch to "Network Provider" Tab
5. Pick your neutron provider, leave "Bridge Mappings" empty

Actual results:
Failed to install Host neseted_host_1. Failed to execute stage 'Misc configuration': list index out of range.

Expected results:
1) If bridge mappings is required parameter, engine dialog should not allow to be confirmed with Bridge Mappings field empty

2) neutron_openvswitch.py should not end up with traceback, but return clear log message about what is wrong if needed

Additional info: