This commit:
1) Changes an Entering logging event from Info to Debug
2) Changes a logging event in case of receiving a message (or an API call)
   regarding a channel that isn't known to the peer from Warn to Debug

Change-Id: If10cd1d0ac1153481e905f2c78f9a2f747834ab5
Signed-off-by: Yacov Manevich <yacovm@il.ibm.com>