Draft: Move some tests
This MR waiting for changes in running tavern tests.
- Move tavern pattern tests to subdirectory of directory 'patttern_tests' - tavern_pattern_tests
- Move mainnet pattern tests to subdirectory of directory 'patttern_tests' - python_pattern_tests
- Move functions to dump and read json transactions to new local_tools in subdirectory
Edited by Radosław Masłowski