Create a stub .zuul.yaml

When creating a new git repo, create a simple .zuul.yaml so that
gating works out of the box on new projects.

Change-Id: I5cd2bbfdcbc73685886a3f019099ea4ac27860f7

jeepyb/utils.py

@@ -164,8 +164,21 @@ port=%s
 project=%s
 defaultbranch=%s
 """ % (GERRIT_HOST, GERRIT_PORT, project_git, default_branch))
-        git_command(repo_path, "add .gitreview")
-        cmd = ("commit -a -m'Added .gitreview' --author='%s'"
+        # Create a Zuul config file
+        with open(os.path.join(repo_path,
+                               ".zuul.yaml"),
+                  'w') as zuul:
+            zuul.write("""- project:
+    check:
+      jobs:
+        - noop
+    gate:
+      jobs:
+        - noop
+""")
+        # Add and commit the files
+        git_command(repo_path, "add .gitreview .zuul.yaml")
+        cmd = ("commit -a -m'Added .gitreview and .zuul.yaml' --author='%s'"
                % GERRIT_GITID)
         git_command(repo_path, cmd)
         return "push %s HEAD:" + ref_str
@@ -231,7 +244,7 @@ class ProjectsRegistry(object):
         if os.path.exists(PROJECTS_INI):
             section = 'projects'
             if self.defaults.has_option(section, item):
-                if type(default) == bool:
+                if isinstance(default, bool):
                     return self.defaults.getboolean(section, item)
                 else:
                     return self.defaults.get(section, item)