Merge pull request #129 from edx/umar/mysql57-cleanup #719

Job	Run time
run_ci (ubuntu-20.04, 3.11, discovery+lms+forum)	1s
run_ci (ubuntu-20.04, 3.11, registrar+lms)	1s
run_ci (ubuntu-20.04, 3.11, ecommerce+lms)	1s
run_ci (ubuntu-20.04, 3.11, edx_notes_api+lms)	1s
run_ci (ubuntu-20.04, 3.11, credentials+lms)	1s
run_ci (ubuntu-20.04, 3.11, xqueue)	1s
run_ci (ubuntu-20.04, 3.11, analyticsapi+insights+lms)	1s
run_ci (ubuntu-20.04, 3.11, designer+lms)	1s
run_ci (ubuntu-20.04, 3.11, enterprise-subsidy+enterprise-catalog+enterprise-access+lms)	1s
run_ci (ubuntu-20.04, 3.11, license-manager+lms)	1s
	10s

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