Make Distil Health check respect collection domains

Without this, when that config is set, the healthcheck will
report uncollected projects that aren't being collected
anymore.

Also fix some testing.

Change-Id: Ife60eee1400ec596565188b477d64f68b247fcec

.zuul.yaml

@@ -0,0 +1,3 @@
+- project:
+    templates:
+      - openstack-python-jobs

distil/service/api/v2/health.py

@@ -43,7 +43,8 @@ def get_health():
     """
     result = {}
 
-    projects_keystone = openstack.get_projects()
+    projects_keystone = openstack.get_projects(
+        domains=CONF.collector.include_domains)
     keystone_projects = [t['id'] for t in projects_keystone
                          if t['name'] not in CONF.collector.ignore_tenants]
 

test-requirements.txt

@@ -1,7 +1,8 @@
 hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
 coverage>=4.0,!=4.4 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-pylint==1.4.5 # GPLv2
+pylint>=1.4.5 # GPLv2
+pyflakes>=2.0
 sqlalchemy-migrate>=0.11.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD