Enable Keystone v3

The interface was not collecting all keystone v3 information passed
along the relation. This change adds the keystone v3 authentication
settings.

Avoid stestr failures due to lack of unit tests.

Change-Id: If7dfd6ec0c6b4e88497c372a37c9be9844845e70

.gitignore

@@ -0,0 +1 @@
+.tox

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.openstack.org
+port=29418
+project=openstack/charm-interface-keystone-admin

requires.py

@@ -45,18 +45,37 @@ class KeystoneRequires(RelationBase):
              u'service_username': u'admin',
              u'service_tenant_name': u'Admin',
              u'service_region': u'RegionOne'}
+       keystone v3 also provides
+            {api_version: "3"
+            service_project_domain_name: admin_domain
+            service_project_name: admin
+            service_protocol: http
+            service_region: RegionOne
+            service_user_domain_name: admin_domain}
         """
         convs = self.conversations()
         if len(convs) > 0:
             conv = convs[0]
-            return {
+            id_admin_data = {
                 'service_hostname': conv.get_remote('service_hostname'),
                 'service_port': conv.get_remote('service_port'),
                 'service_username': conv.get_remote('service_username'),
                 'service_password': conv.get_remote('service_password'),
                 'service_tenant_name': conv.get_remote('service_tenant_name'),
-                'service_region': conv.get_remote('service_region')
+                'service_region': conv.get_remote('service_region'),
             }
+            if conv.get_remote('api_version', u'2') > u'2':
+                id_admin_data['api_version'] = (
+                    conv.get_remote('api_version', u'2'))
+                id_admin_data['service_user_domain_name'] = (
+                    conv.get_remote('service_user_domain_name'))
+                id_admin_data['service_project_domain_name'] = (
+                    conv.get_remote('service_project_domain_name'))
+                id_admin_data['service_project_name'] = (
+                    conv.get_remote('service_project_name'))
+                id_admin_data['service_protocol'] = (
+                    conv.get_remote('service_protocol'))
+            return id_admin_data
         else:
             return {}
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = lint,py27
+envlist = pep8,py27
 skipsdist = True
 
 [testenv]
@@ -7,13 +7,14 @@ setenv = VIRTUAL_ENV={envdir}
          PYTHONHASHSEED=0
 install_command =
   pip install --allow-unverified python-apt {opts} {packages}
-commands = ostestr {posargs}
+whitelist_externals = true
+commands = true
 
 [testenv:py27]
 basepython = python2.7
 deps = -r{toxinidir}/test-requirements.txt
 
-[testenv:lint]
+[testenv:pep8]
 basepython = python2.7
 deps = -r{toxinidir}/test-requirements.txt
 commands = flake8 {posargs}