geo-rep: Fix glusterd working directory

Mountbroker setup in geo-replication requires
the script 'set_geo_rep_pem_keys.sh to be
run manually out of gluster context. Hence
the ${GLUSTERD_WORKDIR} is never set. So
getting glusterd working dir using 'gluster
system:: getwd'.

Change-Id: Ic2fe85e685016b383e38af0ea43c3f0628c16a32
BUG: 1235292
Signed-off-by: Kotresh HR <khiremat@redhat.com>
Reviewed-on: http://review.gluster.org/11381
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Aravinda VK <avishwan@redhat.com>

geo-replication/src/set_geo_rep_pem_keys.sh

@@ -12,6 +12,7 @@ function main()
     user=$1
     master_vol=$2
     slave_vol=$3
+    GLUSTERD_WORKDIR=$(gluster system:: getwd)
 
     if [ "$user" == "" ];  then
         echo "Please enter the user's name"