Reduce HTTP request retry log spam.  Thought I'd done this in an earlier maintenance branch but the code never showed up.  I'll do it again.  Spam is still available by bumping 'CoreHttp' tag up to DEBUGS level logging.  Needed for QA.  Can also get this data from tracing.
Reduce HTTP request retry log spam.  Thought I'd done this in an
earlier maintenance branch but the code never showed up.  I'll do
it again.  Spam is still available by bumping 'CoreHttp' tag up
to DEBUGS level logging.  Needed for QA.  Can also get this data
from tracing.

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm