Loggers shouldn't need to "register" in order to determine
their level. Updated the Level() logic to evaluate a logger's
module name against the current log spec.

FAB-12528 #done

Change-Id: I54bf378cd021ad1e4310b16cf1e313c9e4a39bb0
Signed-off-by: Saad Karim <skarim@us.ibm.com>
Signed-off-by: Will Lahti <wtlahti@us.ibm.com>
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>