976868: enable logging from /usr/libexec/rhsmd

Turn on logging here. This tool can end up making
connections to candlepin and updating status info,
so enable logging.
976868: improve rhsmd logging

Setup a logger at module scope.

If running debug, log any of the existing debug
messages to log.debug as well.

log.info any messages that would previously
get syslog()'ed as well.

Simplify syslog logging.

More detailed log messages.
Merge pull request #669 from candlepin/alikins/976868_rhsmd_should_log_more

Alikins/976868 rhsmd should log more