fixed karma specs with change to axios instead of $.ajax

spec/javascripts/boards/components/labels_select_spec.js

 /* global BoardService */
 
 import Vue from 'vue';
+import MockAdapter from 'axios-mock-adapter';
+import axios from '~/lib/utils/axios_utils';
 import '~/labels_select';
 import LabelsSelect from '~/boards/components/labels_select.vue';
 import IssuableContext from '~/issuable_context';
@@ -32,14 +34,16 @@ const label2 = {
 };
 
 describe('LabelsSelect', () => {
+  let mock;
+
   beforeEach((done) => {
     setFixtures('<div class="test-container"></div>');
 
-    const deferred = new jQuery.Deferred();
-    spyOn($, 'ajax').and.returnValue(deferred.resolve([
+    mock = new MockAdapter(axios);
+    mock.onGet('/some/path').reply(200, [
       label,
       label2,
-    ]));
+    ]);
 
     // eslint-disable-next-line no-new
     new IssuableContext();
@@ -60,6 +64,10 @@ describe('LabelsSelect', () => {
     Vue.nextTick(done);
   });
 
+  afterEach(() => {
+    mock.restore();
+  });
+
   describe('canEdit', () => {
     it('hides Edit button', (done) => {
       vm.canEdit = false;

spec/javascripts/boards/milestone_select_spec.js

 /* global BoardService */
 
 import Vue from 'vue';
+import MockAdapater from 'axios-mock-adapter';
+import axios from '~/lib/utils/axios_utils';
 import MilestoneSelect from '~/boards/components/milestone_select.vue';
 import IssuableContext from '~/issuable_context';
 import { boardObj } from './mock_data';
@@ -92,12 +94,18 @@ describe('Milestone select component', () => {
     });
 
     describe('clicking dropdown items', () => {
+      let mock;
+
       beforeEach(() => {
-        const deferred = new jQuery.Deferred();
-        spyOn($, 'ajax').and.returnValue(deferred.resolve([
+        mock = new MockAdapater(axios);
+        mock.onGet('/test/issue-boards/milestones.json').reply(200, [
           milestone,
           milestone2,
-        ]));
+        ]);
+      });
+
+      afterEach(() => {
+        mock.restore();
       });
 
       it('sets Any Milestone', (done) => {