RigidRepresentation log messages on deactivation are now WARNING level.

Also, updates the messages to include all the variables being checked.
RigidRepresentation now deactivates and logs if parameters are invalid.

This way, a rigid representation with invalid parameters will create a
single log message instead of always "silently failing" its updates.
Style fix in RigidRepresentation.cpp, no space after unary operators.
Merge branch 'fix/rigidrepresentation-log-messages' into 'master'

RigidRepresentation log message updates

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/663123