system jenkins pipeline

Change-Id: Id6d0f202b1aa39844519271a34369a147fa6fcea
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/jenkins/host/start_build b/jenkins/host/start_build
index ecb8ee5..02bfcc2 100755
--- a/jenkins/host/start_build
+++ b/jenkins/host/start_build
@@ -34,6 +34,7 @@
     shift
     [ $# -lt 1 ] && FATAL "missing container name with option --build-container"
     export OSM_BUILD_CONTAINER=$1
+    shift
 fi
 
 if ! container_exists $OSM_BUILD_CONTAINER; then