Currently the logging for polling is verbose. Adjust it as follows:
* In the git driver, don't list every ref we see, just log the count
so we know it's working.
* In the gerrit driver, move logging of some HTTP traffic to the
"io" logger.
* In the default logging configuration for the server, if the '-d'
option is given, do not include "io" logging. The only way to
get this extremely verbose data is now with a custom logging
config.
Change-Id: If0d5877f65296ee2a9f7f0298f8bc6664e6c2a4c
James E. Blair
1e04bdb4aa