CLOUDSTACK-6532:Affinity Groups - As admin user, not able to list all
affinity groups available for regular users by passing account and
domainId paramater. This is to revert IAM way of implementing
listAffinityGroupsCmd, will bring it back when we have implemented real
impersonation.
CLOUDSTACK-6513: Optimize code by removing deprecated utility to
QueryManagerImpl as private method just used for listTemplates and
listAffinityGroups to avoid misuse by new list APIs.