Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  Fix equals method in IndexGroupTask
  Fix failing configuration tests
  Display info about channel's address in debug log
  Add debug logging to the Configuration class
  Fix usage of DEFAULT_SKIP_INTERFACE_LIST

Change-Id: Iac0594d6690574e0cd67f1c25d2f2cb86b318ec9