Fixed bug in nat_osm when sourcing common/all_funcs

Change-Id: Ice49732ff98a7bf73d68fbb10da837193baa1830
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

installers/nat_osm

@@ -35,7 +35,8 @@ usage(){
 
 HERE=$(realpath $(dirname $0))
 OSM_DEVOPS=$(dirname $HERE)
-. $OSM_DEVOPS/jenkins/common/all_funcs
+OSM_JENKINS="$OSM_DEVOPS/jenkins"
+. $OSM_JENKINS/common/all_funcs
 
 #Get default IP address
 . $OSM_DEVOPS/installers/export_ips