log: use /etc/glusterfs/logger.conf file for logging target

This patch fixes to use /etc/glusterfs/logger.conf file instead of
/var/lib/glusterd/logger.conf for logging target (whether to use
syslog or not) at run time.

Change-Id: Icb1de9ebfb7e529940e2aac970978ad70b34b213
BUG: 928648
Signed-off-by: Bala.FA <barumuga@redhat.com>
Reviewed-on: http://review.gluster.org/5542
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
log: add rsyslog gluster configuration file

This patch comes with rsyslog gluster configuration file for fedora
and rhel >= 6.  It disables syslog at rpm build time if targetted
platform is rhel < 6 as there is no rsyslog support.

Change-Id: I95c076874b6891ff08dee1b35980f95529fb0f37
BUG: 928648
Signed-off-by: Bala.FA <barumuga@redhat.com>
Reviewed-on: http://review.gluster.org/5543
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>