Clear security high - False Positive Detection

[lamusmaser]

Fixing a line that is detected, and flagging as a false positive line, due to this module no longer being able to run with the affected version.

Included referential comment near skipped line for future information.

Test performed (for False Positive detection):

Python 2.7.17 (v2.7.17:c2f86d86e6, Oct 19 2019, 21:01:17) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>> import qualysapi

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "qualysapi\__init__.py", line 6, in <module>
    from qualysapi.util import connect
  File "qualysapi\util.py", line 4, in <module>
    import qualysapi.config as qcconf
  File "qualysapi\config.py", line 173
    proxy_config += f":{proxy_port}"
                                   ^
SyntaxError: invalid syntax

Bandit Results:

Code scanned:
        Total lines of code: 1158
        Total lines skipped (#nosec): 1

Run metrics:
        Total issues (by severity):
                Undefined: 0.0
                Low: 3.0
                Medium: 0.0
                High: 0.0
        Total issues (by confidence):
                Undefined: 0.0
                Low: 0.0
                Medium: 0.0
                High: 3.0
Files skipped (0):
ERROR: InvocationError for command 'E:\scripting_misc\qualysapi_builds\qualysapitests_clear-security-high\paragbaxi\qualysapi\.tox\security\Scripts\bandit.EXE' --recursive qualysapi/ (exited with code 1)
_______________________________________________________ summary _______________________________________________________
ERROR:   security: commands failed