Fixes and enhancements:
* now allows for RMR Xapps to call code before entering the infinite loop
* stop is now called before throwing NotImplemented in the case where the client fails to provide a must have callback; this ensures there is no dangling rmr thread
* stop now calls rmr_close to correctly free up any port(s)
* (breaking) renames `loop` to `entrypoint` since the function does not have to contain a loop (though it most likely does)
* Changes wording around the two types of xapps (docs only)
* Uses a new version of rmr python that crashes when the rmr mrc fails to init, which prevents an xapp trying to use an unusable rmr
* more unit test code coverage
* Adds more fields to setup like long_desc and classifiers so the pypi page looks nicer
* Removes a bad release file (will be added back in subseq. commit)
Issue-ID: RIC-228
Change-Id: I2fa0fcce61f54d4ce1d6176ae71eb2139b1005a5
Signed-off-by: Tommy Carpenter <tc677g@att.com>