Description of problem:
We forgot to add the ability to add/remove objects from PM Proxy Preference list in Power Management tab in Edit Host, so if user for example needs to add "Other DC" to the list, he has to do that in REST API.
Version-Release number of selected component (if applicable):
oVirt 3.6.0 RC
Steps to Reproduce:
1. Open New Host dialog, go to Power Management tab, enable power managmement and show Advanced Parameters
2. The order of objects in Power Management Proxy Preference list can be changed, but add/removing objects is not possible
Adding/removing objects from Power Management Proxy Preference list is not possible
Adding/removing objects from Power Management Proxy Preference list is possible,
allowed objects in the list are specified in FenceProxySourceType enum.
*** This bug has been marked as a duplicate of bug 1267503 ***