I UPDATED IT EVEN MORE 
I discovered, that there is @BeforeTestDataBindToTestCase method in TestListener.
So here is my TestListener now:
But be aware, that this method @BeforeTestDataBindToTestCase will run only if you run or debug your TestCase from TestSuite. If you run or debug just a single TestCase, this method won’t run at all…
And here is updated data file:
Data.zip (2.4 KB)
Now you don’t need to put anything to global variables, and you can use your variables in TestCase absolutely normally, like this:
So now it works very well, to summarize it, all you have to do, is to put that Data file to your keywords and create that @BeforeTestDataBindToTestCase method in TestListener. You this only once at the beginning of a project, and then you just write your data types to that Description column and use your variables in a normal way 