glusterfsd: Cleanup in set_log_file_path()

1. Remove un-necessary tmp_ptr - volfile_id is true if volfile_server
   is
2. port is not '1' as default instead its GF_DEFAULT_BASE_PORT

Change-Id: I3eab3f6ccce4b84724d25421002d2f25925ca72d
BUG: 846194
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/5344
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>