disable triggering version discovery in test_generator unit tests

Fixed unit.actions.openstack.test_generator.GeneratorTest.test_generator
failure by avoid triggering version discovery as it needs to talk to
Keystone server. Talking to a live Keystone server is not needed for
this particular unit test.

NOTE: this patch is only applicable to stable/rocky and with the latest
openstacksdk 0.17.3 release.

NOTE: this patch also includes change I9ab552dd4bf3826f358d73a4bddaf1885b1be130
from https://review.opendev.org/#/c/672543/ as both are needed in order
to pass Jenkins.

Change-Id: Ib2c72e89612c9b2b4bccd37cb797804ea40e0b1f
Closes-Bug: 1837468

bindep.txt

@@ -0,0 +1,8 @@
+# This is a cross-platform list tracking distribution packages needed by tests;
+# see http://docs.openstack.org/infra/bindep/ for additional information.
+
+mysql-client [platform:dpkg]
+mysql-server [platform:dpkg]
+postgresql
+postgresql-client [platform:dpkg]
+postgresql-server [platform:rpm]

mistral/tests/unit/actions/openstack/test_generator.py

@@ -85,6 +85,36 @@ class GeneratorTest(base.BaseTest):
         self.baremetal_patch.start()
         self.addCleanup(self.baremetal_patch.stop)
 
+        # When {{ service }}_default_microversion is set, keystoneauth1
+        # will attempt to do version discovery by looking up the services
+        # in the Keystone service catalog and making sure the desire version
+        # is available. Prior to this patch
+        # https://review.opendev.org/#/c/587437/, clustering service does
+        # not set the default microversion. Therefore, there was no
+        # version discovery attempted during these tests. Now that the patch
+        # is included in the latest openstacksdk release, we need to
+        # disable version discovery by nullifying the CURRENT_API_VERSION
+        # in senlinclient in order the tests to pass. These are unit tests
+        # and does not need to talk to a real Keystone server.
+        self._senlin_api_version = None
+
+        def _reset_senlin_api_version():
+            if (actions.senlinclient and
+                    hasattr(actions.senlinclient, 'plugin') and
+                    hasattr(actions.senlinclient.plugin,
+                            'CURRENT_API_VERSION')):
+                actions.senlinclient.CURRENT_API_VERSION = (
+                    self._senlin_api_version)
+
+        if (actions.senlinclient and
+                hasattr(actions.senlinclient, 'plugin') and
+                hasattr(actions.senlinclient.plugin,
+                        'CURRENT_API_VERSION')):
+            self._senlin_api_version = (
+                actions.senlinclient.plugin.CURRENT_API_VERSION)
+            actions.senlinclient.plugin.CURRENT_API_VERSION = None
+            self.addCleanup(_reset_senlin_api_version)
+
     def test_generator(self):
         for generator_cls in generator_factory.all_generators():
             action_classes = generator_cls.create_actions()

releasenotes/notes/bug-1837468-94a8a2e4326ab1e5.yaml

@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    [`bug 1837468 <https://bugs.launchpad.net/keystone/+bug/1837468>`_]
+    Fixed unit.actions.openstack.test_generator.GeneratorTest.test_generator
+    failure by avoid triggering version discovery as it needs to talk to
+    Keystone server. Talking to a live Keystone server is not needed for
+    this particular unit test.