Fix rmr_rpobe command line bug; add test coverage

Fix rmr_rpobe command line bug; add test coverage

This change corrects a deficency in the command line parsing of
the rmr_probe support utility. It also adds unit test code to
cover a significant portion of the SI95 code which was previously
not covered.  Commented out code in SI95 was also removed to
reduce the sonar grumblings.

Issue-ID: RIC-645

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Change-Id: I5943bacf8d7434a7991781dba70b01bf5c16c67d