For aDuke. He was trying to use a "test property" from the command line to determine whether or not a test would be run. But the command line was parsed ''after'' all of the tests were registered. It wasn't possible to just rearrange a few lines in main(). Instead, I split apart the test suite registration and the test registration to provide the required flexibility.


(I also made some line spacing consistent, changed a few NULLs to nullptrs, and fixed a few unimportant copy-paste errors in the test names.)


Order of actions was:
* test suites and tests registered
* command line parsed (needs test suites to be registered already)

Order of actions is now:
* test suites registered
* command line parsed (needs test suites to be registered already)
* tests registered (needs test suites to be registered already) (needs command line parsed already)

Possible improvements:
* new "step" parameter to registration functions uses hard-coded 0 and 1 instead of enums or defines.
* the RandomMapAssemblyTests do something unique with cvars. I kept that code with the test suite registration part.