Simplify git clone code in CI test (#1434)

1. Simplify git clone code in CI test.
2. Replace git clone branch in Dockerfile.

Signed-off-by: chensuyue <suyue.chen@intel.com>

DocSum/tests/test_compose_on_rocm.sh

@@ -8,8 +8,6 @@ IMAGE_TAG=${IMAGE_TAG:-"latest"}
 echo "REGISTRY=IMAGE_REPO=${IMAGE_REPO}"
 echo "TAG=IMAGE_TAG=${IMAGE_TAG}"
 
-
-
 WORKPATH=$(dirname "$PWD")
 LOG_PATH="$WORKPATH/tests"
 ip_address=$(hostname -I | awk '{print $1}')