Fortran: Make tensor size an optional argument for put_tensor unpack_tensor

[ashao]

Description

Currently, the size of the tensor must be specified when using the put_tensor and unpack_tensor commands. This was largely done to serve as an extra 'check' to ensure that the C/C++ client would not accidentally violate the expected memory space.

This argument can be made an optional argument, perhaps useful as an extra debugging feature.

Justification

This will great simplify the process for users to put/unpack subsets of a tensor. For most other cases, this will remove one argument from the call line.

Implementation Strategy

• The 'include' files that are used for templating the Fortran subroutines will need to be updated to reflect it being an optional argument
• A check will need to be done to see if the tensor size argument has been passed: if so, then those dimensions will be passed through the rest of the C/C++ interface, if not, then the SmartRedis client will determine the dimensions using the SHAPE intrinsic