Simplify git clone code in CI test (#1422)

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

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

RerankFinetuning/tests/test_compose_on_xeon.sh

@@ -18,7 +18,7 @@ ray_port=8265
 function build_docker_images() {
     cd $WORKPATH/docker_image_build
     if [ ! -d "GenAIComps" ] ; then
-        git clone https://github.com/opea-project/GenAIComps.git && cd GenAIComps && git checkout "${opea_branch:-"main"}" && cd ../
+        git clone --depth 1 --branch ${opea_branch:-"main"} https://github.com/opea-project/GenAIComps.git
     fi
     docker compose -f build.yaml build --no-cache > ${LOG_PATH}/docker_image_build.log
 }
@@ -94,7 +94,7 @@ EOF
         echo "[ $SERVICE_NAME ] Content is as expected."
     fi
 
-    sleep 10m
+    sleep 1s
 }
 
 function stop_docker() {