Modify Should Save Tensor Test To Work on Any Version of TF (aws#352)

Author: NihalHarish

tests/tensorflow2/test_should_save_tensor.py

@@ -4,6 +4,7 @@
 # First Party
 import smdebug.tensorflow as smd
 from smdebug.core.collection import CollectionKeys
+from smdebug.core.modes import ModeKeys
 from smdebug.tensorflow import SaveConfig
 from smdebug.tensorflow.constants import TF_DEFAULT_SAVED_COLLECTIONS
 
@@ -27,6 +28,9 @@ def helper_create_hook(out_dir, collections, include_regex=None):
             hook.get_collection(collection).include(include_regex)
 
     hook.register_model(model)
+    hook.set_mode(ModeKeys.TRAIN)
+    hook._prepare_collections()
+    hook._increment_step()
     hook.on_train_begin()
     return hook