Add python jobs to tripleo-image-elements

This change also fixes the python tests to properly mock the path so our
stubs work if the command already exists on the system path.

Change-Id: I7c54b1d99e7cf6c4e3f4ded8c518bf447b2ba1de

elements/os-svc-install/tests/test_os_svc_daemon.py

@@ -177,6 +177,7 @@ end script
         output = self._run_command(
             ['elements/os-svc-install/bin/os-svc-daemon',
              '-p',
+             '-l',
              '-n', 'foo',
              '-u', 'foo',
              '-e', 'foo=bar',

tests/base.py

@@ -24,7 +24,7 @@ class ScriptTestBase(base.BaseTestCase):
         super(ScriptTestBase, self).setUp()
         self.tmpdir = tempfile.mkdtemp()
         self.env = os.environ.copy()
-        self.env['PATH'] = self.env['PATH'] + ':' + self.tmpdir
+        self.env['PATH'] = self.tmpdir + ':' + self.env['PATH']
 
     def _stub_script(self, name, contents):
         filename = os.path.join(self.tmpdir, name)

tox.ini

@@ -6,8 +6,10 @@ envlist = py27,pep8
 [testenv]
 usedevelop = True
 install_command = pip install {opts} {packages}
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
+deps =
+    -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+    -r{toxinidir}/requirements.txt
+    -r{toxinidir}/test-requirements.txt
 commands=
     python setup.py testr --slowest --testr-args='{posargs}'
 

zuul.d/layout.yaml

@@ -1,5 +1,6 @@
 
 - project:
     templates:
+      - openstack-python-jobs
       - tripleo-multinode-baremetal-minimal
       - tripleo-multinode-container-minimal