The get, post and put core methods do not properly handle absolute URLs

[jeffshurtliff]

Describe the bug
The khoros.core.Khoros.get method for performing generic GET requests does not properly handle absolute URLs. Method calls with the relative_url=False parameter fail with an InvalidSchema exception, as demonstrated below.

Note: Error below has been sanitized

>>> response = khoros.get('https://community.example.com/plugins/custom/example/example/custom_endpoint', relative_url=False)
Traceback (most recent call last):
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\khoros\api.py", line 228, in get_request_with_retries
    response = requests.get(query_url, headers=headers, verify=verify)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\requests\sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\requests\sessions.py", line 649, in send
    adapter = self.get_adapter(url=request.url)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\requests\sessions.py", line 742, in get_adapter
    raise InvalidSchema("No connection adapters were found for {!r}".format(url))
requests.exceptions.InvalidSchema: No connection adapters were found for '/https://community.example.com/plugins/custom/example/example/custom_endpoint'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\khoros\core.py", line 587, in get
    proxy_user_object=proxy_user_object)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\khoros\api.py", line 231, in get_request_with_retries
    _report_failed_attempt(exc_msg, 'get', retries)
  File "C:\Users\jeffshurtliff\Development\python\venv\lib\site-packages\khoros\api.py", line 400, in _report_failed_attempt
    raise Exception(f"{_exc_name}: {_exc_msg}")
Exception: InvalidSchema: No connection adapters were found for '/https://community.example.com/plugins/custom/example/example/custom_endpoint'

Affected version

>>> khoros.version
'4.1.1'

[jeffshurtliff]

Updated the title as this issue also occurs with the post and put core methods.

[jeffshurtliff]

This is now resolved in v4.2.0