Revert "Remove traces of now unused host capabilities from scheduler"

This reverts commit ce3f9e5fa9cd05f3ee3bb0cc7d06521d05901cf4.

This commit caused problems in tripleo, nova-bm isn't able to launch
instance as they are being filtered out by ComputeCapabilitiesFilter.

Fixes bug #1326289

Change-Id: Icaae95eea78eff11cee34e8a3875d62b3cce0b60
Merge "Revert "Remove traces of now unused host capabilities from scheduler""