Description of problem:
Adding the cluster response
<cluster>
    <name>golden_env_mixed_2</name>
    <cpu id="Intel Conroe Family"/>
    <data_center id="f56afe09-7b32-4436-8e57-da3a04794a7c"/>
</cluster>

fails with the error
<fault>
<reason>Operation Failed</reason>
<detail>[KSM or balooning must be enabled to allow memory optimization.]</detail>
 </fault>

Version-Release number of selected component (if applicable):
rhevm-3.6.11-0.1.el6.noarch

How reproducible:
Always

Steps to Reproduce:
1. Create the cluster with the body above
2.
3.

Actual results:
<fault>
<reason>Operation Failed</reason>
<detail>[KSM or balooning must be enabled to allow memory optimization.]</detail>
 </fault>

Expected results:
Request succeeds without any errors and cluster created.

Additional info:
W/A <cluster>
    <name>golden_env_mixed_2</name>
    <cpu id="Intel Conroe Family"/>
    <data_center id="f56afe09-7b32-4436-8e57-da3a04794a7c"/>
    <version major="3" minor="6"/>
  	<memory_policy>
		<overcommit percent="100" />
 	</memory_policy>
</cluster>