Runing c and py tests.

[Hadatko]

Pull request

Choose Correct

• [ ] bug
• [X] feature

Describe the pull request

Ability to run python execution tests and also test communication of client/server applications using different language.

To Reproduce

in root folder run pytest-3 test

Expected behavior

test_passing :D

Screenshots

Desktop (please complete the following information):

• OS:
• eRPC Version:

Steps you didn't forgot to do

• [X I checked if other PR isn't solving this issue.
• [X] I read Contribution details and did appropriate actions.
• [X] PR code is tested.
• [X] PR code is formatted.

Additional context

[Hadatko]

Curently WIP (prealpha)