increase heap size for maven process in build script to 2g using MAVEN_OPTS

configuration/buildAndUpdateProduct.sh

@@ -708,6 +708,7 @@ if [[ "$@" == "build" ]] || [[ "$@" == "all" ]]; then
         echo "Using following command: mvn $extra -DargLine=\"$APP_PARAMETERS\" -fae -s $MAVEN_SETTINGS $clean install"
         echo "Maven version used: `mvn --version`"
         echo "JAVA_HOME used: $JAVA_HOME"
+	export MAVEN_OPTS="-Xmx2g"
         mvn $extra -DargLine="$APP_PARAMETERS" -fae -s $MAVEN_SETTINGS $clean install 2>&1 | tee -a $START_DIR/build.log
         # now get the exit status from mvn, and not that of tee which is what $? contains now
         MVN_EXIT_CODE=${PIPESTATUS[0]}