reports: edited ic query-all_dcs_with_storage

I edited the, all_dcs_with_storage, input control query,
so it will be more readable and added comments.

Change-Id: Ib493194b999faf7d8f371a12c06a357ce8ab6b0e
Signed-off-by: Shirly Radco <sradco@redhat.com>