Bug/inba 520 fix tests

[Perry5]

If this PR fixes a bug, you must add test cases representative of the bug.

Please refer to Tettra for PR review guidelines.

What does this PR do?

Fixes: user.integration, discussion.integration and task.integration And adds instruction to the PR template for making sure tests pass

Related JIRA tickets:

https://jira.amida-tech.com/browse/INBA-520

How should this be manually tested?

Run three of the tests: node_modules/.bin/mocha test/user.integration.js test/discussion.integration.js test/task.integration.js --bail -t 10000

Background/Context

Okay, this is important:

• The tests now all use the same DB. Before each test is executed the tables in the DB are dropped and recreated.
• I separated the DB's for testing and for development locally. So you would need these .env variables: INDABA_PG_DB=indaba_dev INDABA_PG_TEST_DB=indaba_test and you would need to create the DB's. The DB's really only need to be created once, unless you drop them for whatever reason.
• The tests now use mock- so where ever we use request-promise to communicate with other services, in order for the test not to rely on those services running, any request made to them returns a 200.
• The seed.js script now actually communicates with the other services in order to properly seed the greyscale DB/tables. Next step for this would be to create a file that would contain actual seed data (project, workflows, UOA's etc) to use for seeding (created in INBA-847).

Screenshots (if appropriate):

[jmfadeley]

The timeout on my machine was exceeded, trying at 20,000.

Windows: Molasses Edition.