fix RETNIL and RETDEF throwing script errors in scheduled environment

[commy2]

When merged this pull request will:

• title
• fix RETNIL and RETDEF throwing script errors #566
• also adds unit test

execVM "\x\cba\addons\common\test_ret.sqf"

[Dorbedo]

Aren't the macros part of the main component?
If not, maybe the test_macro_is_x.sqf should be moved to common too.

[commy2]

The problem is that the ruby script is set up in a way were test_x is not included. The test.sqf in main is only a hub to call the other test functions. test_macro_is_x.sqf is never used atm.
Tbh, I think it is easier to just execVM the individual tests, since params throws errors now and a bunch of other tests fail every time (sometimes due to a lacking player when tested in the 2d editor).

[commy2]

There. Moved. No guarantee that the test still works though.