Check that responsejson is instance of dict

[stellasphere]

Description

The current error handling of rfapi.py implies that responsejson is always a dict, however this seems to not be the case and fails without recourse when responsejson is a string.

Therefore, the condition should not only check that responsejson exists, but rather if it is a instance of a dict, since under the condition, it uses methods that are only valid on dictionaries.

This does not change any behavior as the else statement will return the response as a string regardless.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How has this change been tested, please provide a testcase or example of how you tested the change?

Tested local example, ran full test suite including test_rfapi.py

Any specific deployment considerations

For example, documentation changes, usability, usage/costs, secrets, etc.

Docs

• Docs updated? What were the changes: