gluster-nagios-monitoring : messageOrigin url formation fixed

This patch fixes the message origin url formation by appending
the port address to the url if and only if the the $location has
port address and the port address is present in the $location
absolute url.

Change-Id: I2dd11b3accc83fe4a603a930c4fcaf9c3261a271
Signed-off-by: Anmol Babu <anbabu@redhat.com>