Since one of pylint's complains was that the globals module was
shadowing the built-in, and since the name `config` was already
is use in several modules, globals.py was renamed as mt_config.py.
All tests now pass, and the only remaining local pylint errors
relate to the protobuf code, I'm hoping this will make the PR
valid.
The global object formerly used is now replaced by direct use
of the namespace opf the globals module. This eliminates the
redundant getters and setters and simplifies the code for
future maintainers.
Note that the globals module name conflicts (harmlessly at
present) with a Python built-in function. A future commit
should rename it `config` to remove this clash and better
represent its intended purpose.
