gluster: Gluster Sync job event log corrected

Corrected the event log message shown in the case of reset of a volume
option through CLI. Now it shows the value of the reset option as well
in the event log message.

Change-Id: I82ed05a8ef5faec8202b79fe0037482d956f3fed
Bug-Url: https://bugzilla.redhat.com/956041
Signed-off-by: Shubhendu Tripathi <shtripat@redhat.com>