Set compiler flags based on JDK version used (#6 )

* Revert "Fix javadoc build for 11.0.2"

This reverts commit 82d0295.

Signed-off-by: Piotrek Zygielo <piotr@zygielo.pl>

* Set compiler flags in profiles activated by JDK version

Signed-off-by: Piotrek Zygielo <piotr@zygielo.pl>

632dc00