Update the config file handler so that it will do something with the
ConfigChangeResult objects that are returned from attempting to apply
configuration changes.  It will perform the following (in order of precedence):

- For any method that returns a null ConfigChangeResult, it will be logged as
  such using a SEVERE_ERROR level.

- For any method that returns a result with a result code other than success,
  it will be logged at a SEVERE_ERROR level.

- For any method that returns a result with admin action required, it will be
  logged at a SEVERE_WARNING level.

- For any method that returns a result with messages, it will be logged at an
  INFORMATIONAL level.

OpenDS Issue Number:  1367