Posting payment tests fail with ValidationError

[Laura10101]

FAILED payments_api/test_views.py::test_post_payment_with_null_subscription_option_id - django.core.exceptions.ValidationError: ['Parameter total must be a valid float to 2 decimal places'] FAILED payments_api/test_views.py::test_post_payment_with_negative_subscription_option_id - django.core.exceptions.ValidationError: ['Parameter total must be a valid float to 2 decimal places'] FAILED payments_api/test_views.py::test_post_payment_with_negative_total - django.core.exceptions.ValidationError: ['Parameter total must be a valid float to 2 decimal places'] FAILED payments_api/test_views.py::test_post_payment_with_invalid_currency_code - django.core.exceptions.ValidationError: ['Parameter total must be a valid float to 2 decimal places'] FAILED payments_api/test_views.py::test_post_valid_payment - django.core.exceptions.ValidationError: ['Parameter total must be a valid float to 2 decimal places']

[Laura10101]

Modified validation rule in the create_payment service to allow total to be a float or an integer.