Add model name to the logs in CLI

Description of Problem: It would be more informative if the name of the model which is currently being loaded is displayed in the logs for CLI commands like rasa shell rasa shell nlu rasa run

Overview of the Solution:

(tensorflow) PS O:\Office\Chatbot\HealthCareChatbot\Chatbot\latest_vtest> rasa shell nlu --debug
2020-09-04 10:31:54 DEBUG    rasa.model  - Extracted the model {- MODEL_NAME } to 'C:\Users\Akhilesh\AppData\Local\Temp\tmpkpg3apm3'.
2020-09-04 10:32:25 INFO     rasa.nlu.components  - Added 'SpacyNLP' to component cache. Key 'SpacyNLP-en'.
2020-09-04 10:32:25 DEBUG    rasa.utils.tensorflow.models  - Loading the model {- MODEL_NAME }...
2020-09-04 10:32:42 DEBUG    rasa.utils.tensorflow.models  - Finished loading the model.
2020-09-04 10:32:42 DEBUG    rasa.utils.tensorflow.models  - Building tensorflow prediction graph...
2020-09-04 10:32:49 DEBUG    rasa.utils.tensorflow.models  - Finished building tensorflow prediction graph.
2020-09-04 10:33:05 INFO     rasa.nlu.components  - Added 'SpacyNLP' to component cache. Key 'SpacyNLP-en_core_web_md'.
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[lucasdutraf]

Hey there, @tabergma ! Is someone working on this issue? I’m new to Rasa community and code contribution, so I think this issue could be a nice start for me! Can I work on this?

[tabergma]

As far as I understood the request of @Akhil-YS the model path should appear in all kind of commands and not only in debug mode but in also if you run, for example, rasa shell without the --debug flag. Regarding the expected output, I would log something like Loading model <relative model path>.... As mentioned above I think you should be able to add a log statement in this line to solve the issue, but needs to be checked.