Revert the legacy_compute v2 api for nova
Revert the legacy_compute v2 api for nova

The related bugs are closed long-long time ago,
so this change tryes to remove the workaround added by the
reverted commit.

Related-Bug: #1493446
Related-Bug: #1491737

This reverts commit 5cc4f2ea82df311bb2fa906786f12d372addf230.

Change-Id: Ia56d3225ca4e29d239b4a792a08c081b3f0ac636

hplustree/trove,openstack/trove,hplustree/trove,mmasaki/trove,zhangg/trove,mmasaki/trove,openstack/trove,mmasaki/trove,zhangg/trove