[4/N] Dynalab-cli test-local

[mazhiyi]

• Check the setup_config includes all required keys and values. Check all the files exist.
• Check that handler file and all extra files are under the same root directory (requirement from torchserve archive, is this sufficient? Note we don’t use model file here.).
• Check validity of file size and ask to remove large files.
• Check that handler inherits from the correct task base handler.
• Run preliminary checks to see if this looks like it might work (basically like our current testhandler.py). Call the testhandler of the specific task with example data to check that it’s expecting and returning the right things. This should print a message like “local test passed” or “something went wrong”.