fix: update pylintrc to edx-lint 5.6.0 and fix resulting linting issues#2982

meredith-f wants to merge 1 commit intoopenedx:masteropenedx/credentials:masterfrom

meredith-f:meredith/issue-2759-pylintrc-needs-updatemeredith-f/credentials:meredith/issue-2759-pylintrc-needs-updateCopy head branch name to clipboard