FindHDF5: Use Upstream CMake Version

[ax3l]

Since CMake 3.3.0+ the VERSION is supported in upstream FindHDF5.cmake

Our self-made module was introduced in #176 and is too cumbersome to maintain. Also, supporting CMake 2.X is not a sane idea anymore.

Related to https://github.com/ComputationalRadiationPhysics/picongpu/issues/2369#issuecomment-342814749

Note: We might need CMake 3.10.0+

• [ ] FindHDF5: PARALLEL detection was broken (on Piz Daint at least) https://github.com/Kitware/CMake/commit/8b9d8c4ddc9ff4d4cac396e84c8a44c622871ee9
• [ ] FindHDF5: C VERSION detection (which we use) was broken: https://gitlab.kitware.com/cmake/cmake/merge_requests/1465

-> CMake 3.6-3.9 contains broken FindHDF5 scripts, will update the CMake requirement before the next release

[psychocoderHPC]

Due to the bug in CMake <3.10.0 is it useful to merge this PR?

[ax3l]

I think only CMake 3.6-3.9 contains broken FindHDF5 scripts ;)