Get tests to pass with PRs from forks.

[brizental]

So, we use some encrypted variables in Travis and that is why the tests don't pass for forks.

Talking to @miketaylr, we decided it would be best to just go around the tests that need these secure variables for now. Basically make a subset of tests that don't need them for when the PR is from a fork.

Not ideal, but there is an open issue for encrypted vars to work with forks in the Travis repo (travis-ci/travis-ci#1946). We could watch that and when it's done we could let any PR run all tests.

[EDIT]

So, I figured if we get all tests to always mock all responses and stuff, basically, get them all to work offline, we wouldn't need anymore secure variables and then all tests would always run for everyone.

So now what's needed for this to work is:

• Check that all unittests are working offline, if not, get them to. We already have and open issue for that 4 unit tests are network dependent. #1618
  NOTE: funcional tests are already all working offline (see: Fixes #1620 - Gets all functional tests to work offline. #1625 )
• Remove all secure variables and the conditional for different test suites from travis.yml.