Patch for issue #692

[anindex]

This PR proposes bug fix for issue #692 by adding explicitly SizeType and IndexType into template arguments when initializing patttern_t in StoreHDF read and write.

[devreal]

@anindex Do I understand your commits right that HDF5 is not enabled in CI? It would be nice to have a test case for reported issue somewhere. I believe there is a dedicated set of HDF5 tests.

[anindex]

I will write a test case for HDF5 read and write in other PR, for now, I will keep this fix minimal :)

[devreal]

Looking at the patch again I realized that it fixes the symptoms of the problem (a type-mismatch in the HDF5 driver) but eventually we should address the underlying issues of the DASH types being inflexible with regard to the types they accept. TilePattern should, for example, have a c'tor templated on the type of SizeSpec and convert it if necessary. Maybe that will come as a byproduct of the pattern test suite :)

[devreal]

Also: the codecov CI seems broken. Merging anyway.