Add Tests for all XX_request methods in test_interpreter.cpp

[anutosh491]

I think now, for a start we have some implementation for all request methods.
We also have tests for some of them and we can finish the others I guess

• execute_request
• inspect_request
• complete_request
• is_complete_request
• kernel_info_request
• shutdown_request

[anutosh491]

cc @tharun571 you might be interested to cover some of these.

[tharun571]

Writing tests for other files right now. Is it fine if I get on this after that?

[anutosh491]

Yeah no issues at all. Just thought of making a note of what we've covered and what we should be addressing.

[anutosh491]

This issue can now we closed as we've added basic tests for all request methods through #116 and #124