Add jobs of pylint, docs, formatting in .travis.yml

[bismitaguha]

Description

As a contributor,
I need to make respective tests for each contribution,
so that I can ensure proper code-checks

Mocks

N/A

Acceptance Criteria

Update [Required]

• .travis.yml

Enhancement to Update [Optional]

• Travis CI tests

Definition of Done

• All of the required items are completed.
• Approval by 1 mentor.

Estimation

1.5 hours

[bismitaguha]

@sammy1997 @isabelcosta I would like to work on this issue. Please add the respective labels and assign it to me.

[sammy1997]

Can you explain a bit about the changes you want to make?

[bismitaguha]

@sammy1997 I wish to add jobs for python testing. No jobs are currently added in the .travis.yml. Adding jobs of pylint, docs and formatting will check all the formatting and pylint errors in the code before the build. This will maintain the code quality and check linting of every PR.

[sammy1997]

Ok. Seems valid. Approving this

[sammy1997]

Adding a Pylint might cause the build to fail though. Don't send a PR yet. We need to discuss whether we want that in travis or do we want to add codacy for separate linting checks like VMS. We already have a flake test

[bismitaguha]

Codacy is a better option as its only purpose is checking code quality. Travis CI can be kept separate only for the build purpose. Flake test is a part of pytest. We can use the complete features of pytest, not staying just limited to flake test.
@sammy1997 What are your suggestions on this?