communication MPIRequest.wait()

[mtar]

Description
A clear and concise description of the bug and the associated functionality.

ht.communication substitutes the capitalized MPI functions only. The lowercase functions are the standard mpi4py functions.
Therefore, MPIRequest should not modify wait(). Also, Wait() should be called only if one of the MPI functions defined in communications is called.

To fix:

• delete wait() in MPIRequest
• rewrite all instances where MPIRequest.wait() is called wrongly