Deprecate the volume_feature_enabled.volume_services feature flag

Now that Liberty is EOL, the feature flag is not needed anymore. But
we still need to deprecate it in order to remove it later.

Change-Id: I7073106988a79aad19c6b95bb050d2eaf00c36c0
diff --git a/releasenotes/notes/deprecate-volume_feature_enabled.volume_services-dbe024ea067d5ab2.yaml b/releasenotes/notes/deprecate-volume_feature_enabled.volume_services-dbe024ea067d5ab2.yaml
new file mode 100644
index 0000000..c80f159
--- /dev/null
+++ b/releasenotes/notes/deprecate-volume_feature_enabled.volume_services-dbe024ea067d5ab2.yaml
@@ -0,0 +1,8 @@
+---
+upgrade:
+  - The default value for the ``volume_services`` option in the
+    ``volume_feature_enabled`` section has been changed from ``False``
+    to ``True``.
+deprecations:
+  - The ``volume_services`` option in the ``volume_feature_enabled`` section
+    is now deprecated.
diff --git a/tempest/config.py b/tempest/config.py
index 0e45f2e..4ae9a39 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -817,8 +817,11 @@
                 help="Is the v3 volume API enabled"),
     # TODO(ynesenenko): Remove volume_services once liberty-eol happens.
     cfg.BoolOpt('volume_services',
-                default=False,
-                help='Extract correct host info from host@backend')
+                default=True,
+                help='Extract correct host info from host@backend',
+                deprecated_for_removal=True,
+                deprecated_reason='This config switch was added for Liberty '
+                                  'which is not supported anymore.')
 ]