Fix rate limiting testing bug by relaxing the test timing
Fix rate limiting testing bug by relaxing the test timing

Stanford-Online/edx-platform,Stanford-Online/edx-platform,jbassen/edx-platform,caesar2164/edx-platform,caesar2164/edx-platform,caesar2164/edx-platform,Stanford-Online/edx-platform,jbassen/edx-platform,Stanford-Online/edx-platform,jbassen/edx-platform,caesar2164/edx-platform,jbassen/edx-platform,jbassen/edx-platform