Ensure the same branch is used for common build

Only the master branch is used today, but be ready when there
are additional branches

Change-Id: I77c9265c3c23dfcf04bb77db01527cc0b12cccfb

common/build_common.sh

@@ -4,6 +4,7 @@ ME=`whoami`
 echo "Running as user: $ME"
 MVN=$1
 VERSION=$2
+BRANCH=$3
 
 check_user() {
     ME=$1
@@ -22,7 +23,7 @@ fi
 
 # This should only be done on the stack forge system
 if [ "${BUILD_COMMON}" = "true" ]; then
-   git clone https://github.com/openstack/monasca-common
+   git clone -b ${BRANCH} https://git.openstack.org/openstack/monasca-common
    cd monasca-common
    ${MVN} clean
    ${MVN} install

run_maven.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+set -x
+env
 # Download maven 3 if the system maven isn't maven 3
 VERSION=`mvn -v | grep "Apache Maven 3"`
 if [ -z "${VERSION}" ]; then
@@ -28,7 +30,13 @@ for ARG in $*; do
 done
 
 if [ $RUN_BUILD = "true" ]; then
-    ( cd common; ./build_common.sh ${MVN} ${COMMON_VERSION} )
+    if [ ! -z "$ZUUL_BRANCH" ]; then
+        BRANCH=${ZUUL_BRANCH}
+    else
+        BRANCH=${ZUUL_REF}
+    fi
+
+    ( cd common; ./build_common.sh ${MVN} ${COMMON_VERSION} ${BRANCH} )
     RC=$?
     if [ $RC != 0 ]; then
         exit $RC