stage_4 support

Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
Change-Id: Ic997b0baf6ad9cedf486a506f050e016a0c5796a
diff --git a/jenkins/common/install_common b/jenkins/common/install_common
index 3884b0e..b769014 100755
--- a/jenkins/common/install_common
+++ b/jenkins/common/install_common
@@ -21,7 +21,7 @@
 REPOSITORY="stable"
 REPOSITORY_BASE="http://osm-download.etsi.org/repository/osm/debian"
 
-while getopts ":r:k:u:R:b:" o; do
+while getopts ":r:k:u:R:b:-:" o; do
     case "${o}" in
         r)
             REPOSITORY=${OPTARG}
@@ -38,6 +38,8 @@
         b)
             ## ignore branch option
             ;;
+        -)
+            ;;
     esac
 done