Added a test to ensure that all blueprints have a registered before_request method.

Added a test for the status endpoint.

tests/app/status/test_status.py

@@ -0,0 +1,13 @@
+from flask import json
+
+
+def test_get_status_all_ok(client):
+    path = '/_status'
+    response = client.get(path)
+    assert response.status_code == 200
+    resp_json = json.loads(response.get_data(as_text=True))
+    assert resp_json['status'] == 'ok'
+    assert resp_json['db_version']
+    assert resp_json['travis_commit']
+    assert resp_json['travis_build_number']
+    assert resp_json['build_time']