Add coverage to ranger-agent

- Add coverage for to ranger-agent
- Include additional pep8 checks

Change-Id: I4cb8283350562ebf2c4b61770c104abb1303b666

.coveragerc

@@ -0,0 +1,8 @@
+[run]
+branch = True
+source = ord
+omit = ord/tests/*
+cover_pylib = True
+
+[report]
+ignore_errors = True

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-#Removed py34 & pypy until pep8 issues can be dealt with
+#Removed py35 and pypy not included for now.
 envlist = py27,pep8
 skipsdist = True
 
@@ -35,6 +35,6 @@ commands = oslo_debug_helper {posargs}
 
 [flake8]
 show-source = True
-ignore = H301,F821,H202,H101,H104,H238,H401,H405,E501,F811,F403,H233,F841
+ignore = F841,H101,H405
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build