Bonsai-gym-common

Changed
- Updates for unit testing

Changed
- pylint 1.7.4 fixes

Added
- Added the random seeds in the gym simulator class.
- Added the random seeds in inkling files for `gym-frozenlake-sample`,
`gym-lunarlander-continuous-trpo-sample`, `multi-frozenlake`,
`multi-frozenlake-with-concept-go-down`, `gym-taxi-sample`,
`mujoco-inverted-pendulum-trpo-sample` and `gym-mountaincar-continuous
-trpo-sample`.

Fixed
- Removed the `advance_episode` kwarg from `GymSimulator.reset()`, and
modified the way that method works to fix a bug where total episode rewards
would be incorrectly calculated when using maximum episode length limits.

Fixed
- Config parameter "episode-length" was not working properly.
The simulator was always considering global frame count instead of current
episode frame count.

Fixed
- Fixed namespace error causing crash for python 2.7