Hystrix non blocking command, a copy paste of hystrix command with
changes to support non blocking behavior
fixed test cases
add comments and copyrights
minor formatting
move setter down to subclasses for backwards compatibility
Organize Imports
Upgrade to RxJava 0.17 - work in progress, tests failing
Upgrade HystrixCommand to RxJava 0.17

- updated unit test that no longer worked with new Scheduler implementation
Upgrade HystrixNonBlockingCommand to RxJava 0.17

- open questions on this class