Description of problem:

Engine does not verify that proxy supports PM agent
The fence-agents package of the proxy host may no support the requested power management agent. in this case the whole fencing operation will fail

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


How reproducible:

Steps to Reproduce:
1. Have 3 hosts 
   H1 with 3.1 cluster level in UP on Cluster C1
   H2 with 3.2 or 3.3 in UP on Cluster C2
   H3 with 3.2 or 3.3 in Maintainanace on Cluster C3
2. Configure apc_snmp agent on H2
3. Try to restart H2 from the power management menu
4. A proxy from C1 is selected since there is no other Host in C2 and in teh DC H1 is UP
5. The fencing operation will fail since H1 fence-agants does not support the fence_apc_snmp agent

Actual results:

Fencing operation failed altough H3 can be used as a proxy

Expected results:

Proxy selection should check that the target proxy has support for the requred PM agent 

Additional info: