port admin/test_servers* into Nova V3 tests part1

This changeset only copies the v2 files into the appropriate v3
directories unchanged. This is being tried in order to make
reviewing of the porting easier as gerrit will display only what
is actually changed for v3 rather than entirely new files.

Partially implements blueprint nova-v3-api-tests

Change-Id: Ic32acc0fff4b98287f27b5bcf3475b6a3b457c31
Closes-Bug: #1259056
Merge "port admin/test_servers* into Nova V3 tests part1"