build-test-packages: Fix gerrit based dependency parsing

The repo cloning part of the role was altered to not assume the
'https://' URL prefix. This broke the repo cloning in certain situations
(when only hostname was given). This change restores the original
behavior and assumes a https:// prefix for all gerrit instances.

Change-Id: Ib0606f3676a3ee7454201a80edde29c47f50b666
Closes-bug: #1690899

roles/build-test-packages/library/jenkins_deps.py

@@ -191,6 +191,12 @@ def resolve_dep(host, change_id, branch, revision):
             continue
         new_deps = parse_commit_msg(change['host'], details['commit_msg'])
         to_resolve.extend(new_deps)
+    for index in range(len(deps)):
+        if deps[index]['host'] == 'review.openstack.org':
+            # redirect change cloning to reduce load on review.openstack.org
+            deps[index]['host'] = 'git.openstack.org'
+        # add https:// prefix for cloning the change
+        deps[index]['host'] = ''.join(['https://', deps[index]['host']])
     if len(deps) == 0:
         output_msg.append('error: failed to resolve the target change')
         return {'failed': True,

roles/build-test-packages/library/zuul_deps.py

@@ -54,6 +54,9 @@ def process(host, changes, branch):
         # https://bugs.launchpad.net/tripleo/+bug/1676853
         if '.openstack.org' in host:
             host = 'https://git.openstack.org'
+        # add URL prefix if only the bare hostname is given
+        if host.find('://') == -1:
+            host = ''.join(['https://', host])
         output.append({"host": host,
                        "project": params[0],
                        "branch": params[1],