[WIP] Add cache to store information about test template

[pchomik]

Issue: #11 Work plan:

• [x] Add some cache to read template only once per file
• [x] Add logic to read template format for test file
• [x] Add support for pytest parameters via template

[pchomik]

I was able to create something that works. I have to clean and organize code.

[pchomik]

@OddState, @tknerr could try this branch? Spec format can be specified in first 100 lines of the file. Format should be like below:

SPEC_TEST_FORMAT = '[{result}]  {name} {p0}'

where p0 is first parameter. You can add more if you like. I created one example in test/test_params.py file.

[tknerr]

@pchomik thanks! 👍

Let me see if I can give it a try today. Will let you know if it worked here.