Description of problem:

Changelog translator uses <brick>/.glusterfs/changelog as the default directory for recording journals. Default directory can be changed (using "changelog-dir" volume set option). When multiple bricks are hosted on the same node, changelog translator on each brick would write to a common journal (as the path would now be /path/to/journal/CHANGELOG). This would lead in journals corruption and incorrect behavior of application relying on changelogs such as geo-replication, backup utilities etc.


Version-Release number of selected component (if applicable):
mainline

How reproducible:
always

Expected results:
Changelog translator on each brick should ensure that the directory for journals are unique.