Automatic approval of test executions

[omar-selo]

Resolves RTW-265.

Changes:

• Whenever the results of a test execution is submitted to TO from C3, approve that test execution automatically if it passes certain criteria (specified in spec CR060)
• Split test executions controller into multiple files as it was getting too big
• Use DataGenerator in test executions test cases
• Remove ids passed into EndTestExecutionRequest as they aren't necessary and aren't used anywhere
• Updated test results report endpoint to include a few useful fields as requested

[omar-selo]

Sorry for the big diff. Most of it is just splitting test executions controller file into multiple files