Build/Testing Travis Stages

[blankdots]

Splitting the repositories does not seem to be needed as we can have Travis perform different stages of the build process. Main reason for not performing the split into LocalEGA and LocalEGA-deploy is because there is no easy way to trigger LocalEGA-deploy once the LocalEGA passed all tests and also get the results of the LocalEGA-deploy tests.
Stages:

1. First stage is run only on a push or PR on Github and it performs using tox python unit tests (there is an added option for flake8 not utilised yet). There are simple unit tests on the keyserver to get things going
2. Stage 2 is performed only on PR and it runs the Java Test by bootstrapping the LocalEGA docker deployment. The Java (Integration) Tests have been moved under deployment.

[silverdaz]

Looks good to me.
I added a few unit tests for OpenPGP. I doubt tox did anything. But pytest runs fine on its own.

I did not check the PEP8 errors (surprise! 😝).
I think we can add more unit tests later in another PR.
Merging this one.