Revert "Neutron&Designate DNS integration - some enhancements"

This reverts commit 7013c81be19c927dbad56a0cc21cb623c6292ca1.

Reason for revert: designate scenario jobs are failing randomly
across branches, as since this patch in_addr zone needed for a test
are being deleted by concurrently running tests.

Change-Id: I23482a874b13f02cfcfbbdc4a146d722ebfd3682
Related-Bug: #2081252
1 file changed