Add http support to the spring-fat integration test

[volodya-lombrozo]

The spring-fat integration test starts a simple Spring Application with a single bean and this bean prints some logs to the stdout. If stdout contains required logs, we can say that test passes successfully. You can read more about the integration test right here.

Now we want make this test more "realistic". It would be nice to add http support to the application. The possible scenario might be:

1. Start Spring Application with some HTTP server (Spring Web?)
2. Make one http request to this server
3. Check the response status and content

Of course, we need to make jeo-maven-plugin:disassemble and jeo-maven-plugin:assemble before running the testing script described above.

[h1alexbel]

@volodya-lombrozo can I take this issue?

[volodya-lombrozo]

@h1alexbel Sure, please, go ahead! Btw, I did something similar to this issue here. Hope it will help.