Refactor V619_2 edits to use dynamic dates #155

Job	Run time
data_browser_tests	2m 51s
common_tests	2m 26s
check_digit_tests	2m 25s
hmda_analytics_tests	2m 54s
hmda_data_publisher_tests	3m 25s
hmda_platform_tests	6m 21s
hmda_quarterly_data_service_tests	2m 29s
hmda_reporting_tests	2m 37s
institutions_api_tests	2m 35s
modified_lar_tests	2m 27s
rate_limit_tests	2m 26s
ratespread_calculator_tests	2m 25s
submission_errors_tests	2m 33s
	37m 54s

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