Added test for isContentType() (#913)
Added test for isContentType() (#913)

* Added test cases for template functions in Router.swift

* Added new test case to LinuxMain.swift

* Added test for isContentType() method and minor refactoring to other test ContentType tests

* Added test to allTests array

IBM-Swift/Kitura,IBM-Swift/Kitura,naithar/Kitura,naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura