Remove Django dependency from the aggregation requirement

[micdavis]

Is your feature request related to a problem? Please describe.
The aggregation requirement for all clients to push to the server is Django dependent.

Describe the outcome you'd like:
This Django dependency needs to be abstracted away from aggregation requirements.

Additional context:
Location to django dependency: https://github.com/capitalone/federated-model-aggregation/blob/main/fma-core/fma_core/algorithms/requirements/common.py#L15