Add SNMPManager resource
Commenting out nosetests from .travis.yml until I can get a full test env setup.
New & improved test suite; fixed typos TAC+ policy module

- Test suite completely redone to support forthcoming automated tests
vs. a VPX VM.
- Fixed typos (s/polyci/policy)
Updated tests; now @ 50 total

- Updated tests, total of 50 now in tests.py
- Fixed weirdness with getting NSConfig resources; object that comes
back isn’t strictly interpreted as JSON, looks like it lacks [] around
the returned object.
Updated tests.py to use randomized ports/VLANs/IPs
Added more robust test assertions, fixed some things with getting LBVSS bindings
Added graceful option to several resources
Added delay and graceful options + version bump
Fixing debian changelog
Fixing conditions for nsnitrocmd.py
Remove namespace_packages line from setup.py

By making nsnitro a namespace package, pip installation ignores
__init__.py, which means importing the module doesn't work as described
in the examples. Remove the namespace_packages line as it doesn't add
any value.