Orbiter integration and unit tests

Unit tests

Unit tests are written as .cpp files in this directory and registered using add_test_file CMake function. Naming convention is "Module.Test.cpp"

Unit tests have a default timeout of 30 seconds for whole suite

Integration tests

Integration tests are implemented by

1. Adding a Lua script to Script\Tests directory
2. Adding a corresponding scenario referencing this script to Scenarios\Tests directory

Lua script must:

1. Ensure test runs for limited time (under 60 seconds)
2. Call oapi.exit(code) when test is finished, pass non-zero return code in case of failed test, and 0 - if all tests are successful
3. Print information about execution using oapi.write_log