Adds lock server tests

Adds tests for Nova's lock_server policies.

Change-Id: Ic47ada6ea8f0e55794c22fda5eef94a52c363053
Closes-Bug: #1696581
diff --git a/releasenotes/notes/lock-server-460767a02d15bb29.yaml b/releasenotes/notes/lock-server-460767a02d15bb29.yaml
new file mode 100644
index 0000000..7af7ff3
--- /dev/null
+++ b/releasenotes/notes/lock-server-460767a02d15bb29.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Adds tests for Nova's lock_server policies: lock,
+    unlock, and unlock_override.