Change in super-linter fail-under from 9.0 to 10.

[ArekKuczynski]

After fixing enough errors related to the coding standards we should set fail-under back to the 10 in .python-lint file.
Some Pylint codes requires changes to the code, and others perhaps adjustments to the configuration file (.python-lint) like:
R1702-[too-many-nested-blocks],
R0912-[too-many-branches],
R0915-[too-many-statements],
R0904-[too-many-public-methods],
R0902-[too-many-instance-attributes],
R0903-[too-few-public-methods],
etc.

Some codes appear in small numbers (3 for example) and the larger ones have been mentioned in issues:
#275, #276, #277, #278, #279, #280, #281, #282, #283, #284