Description of problem:
today (until rhev 3.5.z) optional channel is required to install vdsm on a rhel hypervisor.

the only pkg that are taken from the optional channel are:

augeas                                         x86_64                   1.0.0-10.el6
libvirt-lock-sanlock                           x86_64                   0.10.2-54.el6
sanlock                                        x86_64                   2.8-2.el6_5
sanlock-lib                                    x86_64                   2.8-2.el6_5
sanlock-python                                 x86_64                   2.8-2.el6_5

Version-Release number of selected component (if applicable):
rhev 3.5.Z

How reproducible:
100%

Steps to Reproduce:
1. install rhev 3.5.3 + add host (don't include optional channel rhel-6-server-optional-rpms)
2. host install will fail on missing pkg
3.

Expected results:
don't require rhel-6-server-optional-rpms

Additional info:
this can be done via tagging in brew to the rhev-mgmt-agent channel instead of optional.