Fix bug 1558 to add DEVOPS_PATH default value to install_osm.sh

Change-Id: I03f013768106da62f6b8ece360e436b4950af239
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

installers/install_osm.sh

@@ -16,6 +16,7 @@ REPOSITORY_BASE=https://osm-download.etsi.org/repository/osm/debian
 RELEASE=ReleaseNINE
 REPOSITORY=stable
 DOCKER_TAG=9
+DEVOPS_PATH=/usr/share/osm-devops
 
 function usage(){
     echo -e "usage: $0 [OPTIONS]"