Make lock policy default to admin or owner

compute:lock and compute:unlock are currently
used by compute.api function wrap_check_policy
this patch set the default value of them to be
same to os_compute_api:os-lock-server.

DocImpact: make the default policy to identical to v2.1 policy.
UpgradeImpact: old cloud need to care the default value change.

Change-Id: Ib862696bbfb7e979d6198f5ca3155f5d1e7b396b

etc/nova/policy.json

@@ -30,8 +30,8 @@
     "compute:stop": "rule:admin_or_owner",
 
     "compute:get_lock": "",
-    "compute:lock": "",
-    "compute:unlock": "",
+    "compute:lock": "rule:admin_or_owner",
+    "compute:unlock": "rule:admin_or_owner",
     "compute:unlock_override": "rule:admin_api",
 
     "compute:get_vnc_console": "",

nova/tests/unit/test_policy.py

@@ -371,6 +371,8 @@ class RealRolePolicyTestCase(test.NoDBTestCase):
 "compute:delete",
 "compute:soft_delete",
 "compute:force_delete",
+"compute:lock",
+"compute:unlock",
 "compute_extension:admin_actions:pause",
 "compute_extension:admin_actions:unpause",
 "compute_extension:admin_actions:suspend",
@@ -442,7 +444,6 @@ class RealRolePolicyTestCase(test.NoDBTestCase):
 "compute:get_spice_console",
 "compute:get_vnc_console",
 "compute:inject_network_info",
-"compute:lock",
 "compute:pause",
 "compute:remove_fixed_ip",
 "compute:rescue",
@@ -455,7 +456,6 @@ class RealRolePolicyTestCase(test.NoDBTestCase):
 "compute:snapshot",
 "compute:suspend",
 "compute:swap_volume",
-"compute:unlock",
 "compute:unpause",
 "compute:unrescue",
 "compute:update",