replacing  `tf.Session()` to  `tf.compat.v1.Session()`  (#4784)
replacing  `tf.Session()` to  `tf.compat.v1.Session()`  (#4784)

* Fix tensorflow dev cross test (#4780)

* init

Signed-off-by: Weichen Xu <b702da6e50975f71fc6618ef763b578cd392d17f@databricks.com>

* dummy tf update

Signed-off-by: Weichen Xu <b702da6e50975f71fc6618ef763b578cd392d17f@databricks.com>
Signed-off-by: unknown <4c0d7422a2e5355bf85d1425d1f54fe6dcb3492c@gmail.com>

* changes in flower classifier train.py

Signed-off-by: unknown <4c0d7422a2e5355bf85d1425d1f54fe6dcb3492c@gmail.com>

Co-authored-by: WeichenXu <b702da6e50975f71fc6618ef763b578cd392d17f@databricks.com>
mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow