add ability to specify another container name prefix

Change-Id: I73fc20b40d2ca391c6adee4840347f090226cc34

Author: Andrey-mp

containers/build.sh

@@ -43,6 +43,7 @@ fi
 
 log "Target platform: $LINUX_DISTR:$LINUX_DISTR_VER"
 log "External Web Cache: $SITE_MIRROR"
+log "Containers name prefix: $CONTAINER_NAME_PREFIX"
 log "Contrail container tag: $CONTRAIL_CONTAINER_TAG"
 log "Contrail registry: $CONTRAIL_REGISTRY"
 log "Contrail repository: $CONTRAIL_REPOSITORY"
@@ -77,7 +78,7 @@ function process_container() {
   # use CONTRAIL_CONTAINER_NAME for build the only conainer
   if [[ -z "${CONTRAIL_CONTAINER_NAME}" ]] ; then
     local container_name=`echo ${dir#"./"} | tr "/" "-"`
-    local container_name="contrail-${container_name}"
+    local container_name="${CONTAINER_NAME_PREFIX}-${container_name}"
   else
     local container_name=${CONTRAIL_CONTAINER_NAME}
   fi

parse-env.sh

@@ -61,7 +61,8 @@ else
   export OPENSTACK_VERSION=${OPENSTACK_VERSION:-'queens'}
 fi
 
-# CONTRAIL_VERSION is depricated.
+export CONTAINER_NAME_PREFIX=${CONTAINER_NAME_PREFIX:-'contrail'}
+# CONTRAIL_VERSION is deprecated.
 # For Compatibility with Juniper CI. Will be removed.
 [ -z "$CONTRAIL_CONTAINER_TAG" ] && [ -n "$CONTRAIL_VERSION" ] && CONTRAIL_CONTAINER_TAG=$CONTRAIL_VERSION
 export CONTRAIL_CONTAINER_TAG=${CONTRAIL_CONTAINER_TAG:-'dev'}