Merge branch 'replace-coffeescript' into 'master'

Convert datetime coffeescript spec to ES6

## What does this MR do?
Converts the last remnant coffeescript file to ES6

## Are there points in the code the reviewer needs to double check?
None

## Why was this MR needed?
Because we aren't using coffeescript anymore 🎈 

## What are the relevant issue numbers?
#21472 

## Screenshots (if relevant)
None

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !6045

CHANGELOG

@@ -61,6 +61,7 @@ v 8.12.0 (unreleased)
   - Move to project dropdown with infinite scroll for better performance
   - Fix leaking of submit buttons outside the width of a main container !18731 (originally by @pavelloz)
   - Load branches asynchronously in Cherry Pick and Revert dialogs.
+  - Convert datetime coffeescript spec to ES6 (ClemMakesApps)
   - Add merge request versions !5467
   - Change using size to use count and caching it for number of group members. !5935
   - Replace play icon font with svg (ClemMakesApps)

spec/javascripts/datetime_utility_spec.js.coffee

-#= require lib/utils/datetime_utility
-
-describe 'Date time utils', ->
-  describe 'get day name', ->
-    it 'should return Sunday', ->
-      day = gl.utils.getDayName(new Date('07/17/2016'))
-      expect(day).toBe('Sunday')
-
-    it 'should return Monday', ->
-      day = gl.utils.getDayName(new Date('07/18/2016'))
-      expect(day).toBe('Monday')
-
-    it 'should return Tuesday', ->
-      day = gl.utils.getDayName(new Date('07/19/2016'))
-      expect(day).toBe('Tuesday')
-
-    it 'should return Wednesday', ->
-      day = gl.utils.getDayName(new Date('07/20/2016'))
-      expect(day).toBe('Wednesday')
-
-    it 'should return Thursday', ->
-      day = gl.utils.getDayName(new Date('07/21/2016'))
-      expect(day).toBe('Thursday')
-
-    it 'should return Friday', ->
-      day = gl.utils.getDayName(new Date('07/22/2016'))
-      expect(day).toBe('Friday')
-
-    it 'should return Saturday', ->
-      day = gl.utils.getDayName(new Date('07/23/2016'))
-      expect(day).toBe('Saturday')
-
-  describe 'get day difference', ->
-    it 'should return 7', ->
-      firstDay = new Date('07/01/2016')
-      secondDay = new Date('07/08/2016')
-      difference = gl.utils.getDayDifference(firstDay, secondDay)
-      expect(difference).toBe(7)
-
-    it 'should return 31', ->
-      firstDay = new Date('07/01/2016')
-      secondDay = new Date('08/01/2016')
-      difference = gl.utils.getDayDifference(firstDay, secondDay)
-      expect(difference).toBe(31)
-
-    it 'should return 365', ->
-      firstDay = new Date('07/02/2015')
-      secondDay = new Date('07/01/2016')
-      difference = gl.utils.getDayDifference(firstDay, secondDay)
-      expect(difference).toBe(365)
\ No newline at end of file

spec/javascripts/datetime_utility_spec.js.es6

+//= require lib/utils/datetime_utility
+(() => {
+  describe('Date time utils', () => {
+    describe('get day name', () => {
+      it('should return Sunday', () => {
+        const day = gl.utils.getDayName(new Date('07/17/2016'));
+        expect(day).toBe('Sunday');
+      });
+
+      it('should return Monday', () => {
+        const day = gl.utils.getDayName(new Date('07/18/2016'));
+        expect(day).toBe('Monday');
+      });
+
+      it('should return Tuesday', () => {
+        const day = gl.utils.getDayName(new Date('07/19/2016'));
+        expect(day).toBe('Tuesday');
+      });
+
+      it('should return Wednesday', () => {
+        const day = gl.utils.getDayName(new Date('07/20/2016'));
+        expect(day).toBe('Wednesday');
+      });
+
+      it('should return Thursday', () => {
+        const day = gl.utils.getDayName(new Date('07/21/2016'));
+        expect(day).toBe('Thursday');
+      });
+
+      it('should return Friday', () => {
+        const day = gl.utils.getDayName(new Date('07/22/2016'));
+        expect(day).toBe('Friday');
+      });
+
+      it('should return Saturday', () => {
+        const day = gl.utils.getDayName(new Date('07/23/2016'));
+        expect(day).toBe('Saturday');
+      });
+    });
+
+    describe('get day difference', () => {
+      it('should return 7', () => {
+        const firstDay = new Date('07/01/2016');
+        const secondDay = new Date('07/08/2016');
+        const difference = gl.utils.getDayDifference(firstDay, secondDay);
+        expect(difference).toBe(7);
+      });
+
+      it('should return 31', () => {
+        const firstDay = new Date('07/01/2016');
+        const secondDay = new Date('08/01/2016');
+        const difference = gl.utils.getDayDifference(firstDay, secondDay);
+        expect(difference).toBe(31);
+      });
+
+      it('should return 365', () => {
+        const firstDay = new Date('07/02/2015');
+        const secondDay = new Date('07/01/2016');
+        const difference = gl.utils.getDayDifference(firstDay, secondDay);
+        expect(difference).toBe(365);
+      });
+    });
+  });
+})();