Add customAuthorization middleware

[coveralls]

Pull Request Test Coverage Report for Build 57

• 20 of 22 (90.91%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 92.929%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/servlet/corsproxy/middlewares/customAuthorization.js	17	19	89.47%
<!--	Total:	20	22	90.91%	-->

Totals
Change from base Build 51:	-0.2%
Covered Lines:	420
Relevant Lines:	443

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💛 - Coveralls