GitLab

* Add test for loading pretrained models

The update modifies the test to check whether the model can successfully load the pretrained weights. Will raise an error if the model parameters are incorrectly defined or named.

* Add test on 'num_class'

Passing num_class equal to a number other than 1000 helps in making the test more enforcing in nature.

* Add basic model testing.

Also fixes flaky test

* Fix flake8