housekeeping: reorganize and rewire Mocha tests (#5600)

* move Mocha-run tests to `test/mocha`

* fix relative paths

* fix JSX test paths

* update stagnated JSX tests

* `test/setup.js` -> `test/mocha/setup.js`

* use regex+globstar for test matching

* remove `console.log`

test/mocha/swagger-ui-dist-package/absolute-path.js

@@ -0,0 +1,13 @@
+/* eslint-env mocha */
+import expect from "expect"
+import path from "path"
+import getAbsoluteFSPath from "../../../swagger-ui-dist-package/absolute-path"
+
+describe("swagger-ui-dist", function(){
+  describe("getAbsoluteFSPath", function(){
+    it("returns absolute path", function(){
+      const expectedPath = path.resolve(__dirname, "../../../swagger-ui-dist-package")
+      expect(getAbsoluteFSPath()).toEqual(expectedPath)
+    })
+  })
+})