change: use sagemaker-training 3.7.0 and enable data parallel integ tests

Author: Dan Choi

setup.py

@@ -53,7 +53,7 @@ def read(fname):
         'Programming Language :: Python :: 3.7',
     ],
 
-    install_requires=['retrying', 'sagemaker-training>=3.5.1', 'six>=1.12.0'],
+    install_requires=['retrying', 'sagemaker-training>=3.7.0', 'six>=1.12.0'],
     extras_require={
         'test': test_dependencies
     },

test/integration/local/test_smdataparallel.py

@@ -21,8 +21,6 @@
 from utils.local_mode_utils import assert_files_exist
 
 
-# TODO: Enable the test once SMDataParallel DLC is publicly accessibly
-@pytest.mark.skip(reason="SMDataParallel DLC is not publicly accessible")
 @pytest.mark.skip_cpu
 @pytest.mark.skip_generic
 def test_smdataparallel_training(sagemaker_local_session, image_uri, framework_version, tmpdir):

test/integration/sagemaker/test_smdataparallel.py

@@ -21,7 +21,6 @@
 from integration.sagemaker.timeout import timeout
 
 
-@pytest.mark.skip(reason="SMDataParallel DLC is not publicly accessible")
 @pytest.mark.skip_cpu
 @pytest.mark.skip_generic
 @pytest.mark.parametrize(