Fix overrides and image_path

The patch fixes the default value of image argument,
which was missing and caused problems in python-tempestconf.
Then the overrides weren't parsed corectly and were not exposed
to python-tempestconf. The patch fixes that too.

Story: 2003787
Task: 26493

Change-Id: Iaeecb838599039067a5b198ec3a08c233dfdac94

refstack_client/refstack_client.py

@@ -468,14 +468,15 @@ class RefstackClient:
         # of scope of python-tempestconf, adding it hardcoded here as a extra
         # overrides.
         cinder_overrides = "volume-feature-enabled.api_v2=True"
-        overrides_format = cinder_overrides.replace('=', ' ').split()
+        overrides_format = cinder_overrides.replace('=', ',').split(',')
+        overrides = []
         if self.args.overrides:
+            overrides = self.args.overrides.replace('=', ',').split(',')
             if cinder_overrides not in self.args.overrides:
-                overrides = self.args.overrides.replace('=', ' ').split(',')
-                extra_overrides = overrides.append(overrides_format)
+                overrides = overrides + overrides_format
         else:
-            extra_overrides = overrides_format
-        kwargs.update({'overrides': main.parse_overrides(extra_overrides)})
+            overrides = overrides_format
+        kwargs.update({'overrides': main.parse_overrides(overrides)})
 
         # Generate accounts.yaml if accounts.file is not given
         if not self.args.test_accounts:
@@ -825,6 +826,7 @@ def parse_cli_args(args=None):
                                action='store',
                                required=False,
                                dest='image',
+                               default=C.DEFAULT_IMAGE,
                                help='An image name chosen from `$ openstack '
                                     'image list` or a filepath/URL of an '
                                     'image to be uploaded to glance and set '

roles/generate-tempestconf-refstack/tasks/main.yaml

@@ -20,8 +20,8 @@
         source .venv/bin/activate
         {{ source_credentials_commands }}
         printenv
-        refstack-client config --use-test-accounts /etc/openstack/accounts.yaml \
-            --image http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img \
+        refstack-client config \
+            --use-test-accounts /etc/openstack/accounts.yaml \
             --out /tmp/tempest.conf
     args:
         chdir: "{{ refstack_client_src_relative_path }}"