core: Remove GetVdsByTypeQuery leftovers

Removed the VdcQueryType.GetVdsByType constant and the
GetVdsByTypeParameters class as the GetVdsByType query no longer
exists in the codebase.

Change-Id: I42ecd45ccf58e544305df394e727926097f63dda
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: Remove the unused GetNonOperationalVdsQuery

Remove GetNonOperationalVdsQuery, since it is not used anywhere in the
codebase.

This patch removes:
1. The GetNonOperationalVdsQuery class.
2. The NetworkNonOperationalQueryParameters only used by the
   aforementioned class.
3. The corresponding GetNonOperationalVds constant in VdcQueryType.
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Change-Id: I21bef4c93c3f40ebcbb39182ca18dda55ef0a7b0
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: Remove unused GetUsersByVmidQuery

Remove the GetUsersByVmidQuery, which is not used anywhere in the code
base.

This patch removes the redundant GetUsersBVmidQuery class, its parameter
class GetUsersByVmidParameters and its corresponding constant in
VdcQueryType.

Change-Id: I1f3dc0aa392c89c03e43c34f98df3fbf68dbd493
Signed-off-by: Allon Mureinik <amureini@redhat.com>