- move some of boxWithStdlib tests under fullJdk/ directory, where they will be
compiled against the full JDK
- introduce FULL_JDK in-text directive for the reflection test as only 4 tests
out of 654 needed the full JDK
Basically, this commit splits test data from the from java-txt-kt to two pairs java-txt and kt-txt.
This commit leads to some duplication in test data.
This is temporary: in the platform types branch the test data for LoadJava tests will be changed dramatically, so duplication will go away