Make changes to prevent non 2.16 from making the change

Author: shantanutrip

src/sagemaker/tensorflow/estimator.py

@@ -177,7 +177,7 @@ def __init__(
                 fw.python_deprecation_warning(self._framework_name, defaults.LATEST_PY2_VERSION)
             )
         self.framework_version = framework_version
-        self.override_fw_version = "2.16"
+        self.override_fw_version = "2.16" if self.framework_version and "2.16" in self.framework_version else None
         # TF training and inference versions do not have a one-to-one connection. This mismatch
         # is accommodated by the underlying dictionary. The key of dictionary relates to the inference
         # version and the value relates to training version.