* Added enum for requested process execution modes
* Added data dict as expected base process.execute param
* Modified base process manager to select execution mode
* Pass requested execution mode to process manager
* Refactored dummy process manager to deal with request execution mode
* Use num value in response headers
* fix bug with non-existent process response headers
* fix flake8 errors
* fix python version errors
* fix python version errors
* fix python version errors
* refactor failing test
* refactor failing test
* fix line length
* fix using tuple in type annotations
* update docs and add missing param docstring
* swapped double quotes for single quotes for consistency
Ricardo Garcia Silva
ac16e5ae97