Update HandlerMappingIntrospector Usage in CORS support #205

Job	Run time
Check Samples	0s
Test Against Snapshots (21-ea, 21) / Test	8m 35s
Build (ubuntu-latest, 17) / Build	9m 3s
Build (windows-latest, 17) / Build	9m 9s
Test Against Snapshots (17, 17) / Test	8m 51s
Send Notification	3s
Deploy Docs	0s
Deploy Schema	0s
Perform Release	0s
Deploy Artifacts	0s
	35m 41s

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