port test_server_rescue into v3 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: I11e258e3f257348e74b4cf4d900c3f9b292e2539
VPNaas IKE policies tests

testcases (create, update, delete, show, and list) for IKE policies.
part of blueprint: vpnaas-api-test-cases
Change-Id: I82e39edadb8160c92f5a72fbdc7035c3a3efd18d
Merge "VPNaas IKE policies tests"
Merge "port test_server_rescue into v3 part1"