Generated [deb] package contains compatibility tests

[lukaszstolarczuk]

Environment Information

• libpmemobj-cpp version(s): current master (e.g. 1.12-42-geca8f5f8)
• tested on Ubuntu 20.10
• Cmake flag TESTS_COMPATIBILITY is set

Please provide a reproduction of the bug:

cd build
cmake .. -DTESTS_COMPATIBILITY=ON -DCPACK_GENERATOR="DEB"
make package

How often bug is revealed:

always

Actual behavior:

Generated deb package (and probably rpm as well) contains the compatibility tests' sources and hence the old versions of libpmemobj-cpp

Expected behavior:

We should at least print a warning in CMake (with info is not recommended) or just test compatibility in different way (e.g. like in pmemkv)