* A connection logs time of encode, decode, commit and
  execute operations
* Add logging to execute_messages, which logs in/out message count
  and time expenditure as difference of the time information before
  and after execution
* change default loglevel from info to warning in order to be able to have
  the time info print in execute_messages on info loglevel without spamming
  the normal user

Depends-On: 11111
Change-Id: I17835a9ae7f089da72a9004a18b967c117b6132d