message: Update test_utils.py
diff: @@ -272,7 +272,7 @@ def run_resnet50(build_dir):
  call(['git', 'clone', 'https://github.com/tensorflow/benchmarks.git'])
  os.chdir('benchmarks/scripts/tf_cnn_benchmarks/')
  - call(['git', 'checkout', 'cnn_tf_v1.13_compatible'])
  + call(['git', 'checkout', '4c7b09ad87bbfc4b1f89650bcee40b3fc5e7dfed'])
  junit_script = os.path.abspath('%s/test/ci/junit-wrap.sh' % root_pwd)
  @@ -333,7 +333,7 @@ def run_resnet50_from_artifacts(ngraph_tf_src_dir, artifact_dir, batch_size,
  # Now clone the repo and proceed
  call(['git', 'clone', 'https://github.com/tensorflow/benchmarks.git'])
  os.chdir('benchmarks')
  - call(['git', 'checkout', 'cnn_tf_v1.13_compatible'])
  + call(['git', 'checkout', '4c7b09ad87bbfc4b1f89650bcee40b3fc5e7dfed'])
  # Check to see if we need to patch the repo for Grappler
  import ngraph_bridge
  