Refactor On-call schedule call

Refractor getOncallSchedulesWithRotations GraphQL
call to only request rotation id in order
to limit complexity.

ee/app/assets/javascripts/oncall_schedules/graphql/queries/get_oncall_schedules.query.graphql

-#import "../fragments/oncall_schedule_rotation.fragment.graphql"
-
 query getOncallSchedulesWithRotations($projectPath: ID!) {
   project(fullPath: $projectPath) {
     incidentManagementOncallSchedules {
@@ -10,7 +8,7 @@ query getOncallSchedulesWithRotations($projectPath: ID!) {
         timezone
         rotations {
           nodes {
-            ...OnCallRotation
+            id
           }
         }
       }

ee/spec/frontend/oncall_schedule/add_edit_schedule_modal_spec.js

@@ -62,7 +62,7 @@ describe('AddScheduleModal', () => {
   }
 
   async function updateSchedule(localWrapper) {
-    localWrapper.find(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
+    localWrapper.findComponent(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
   }
 
   const createComponentWithApollo = ({
@@ -111,11 +111,10 @@ describe('AddScheduleModal', () => {
 
   afterEach(() => {
     wrapper.destroy();
-    wrapper = null;
   });
 
-  const findModal = () => wrapper.find(GlModal);
-  const findAlert = () => wrapper.find(GlAlert);
+  const findModal = () => wrapper.findComponent(GlModal);
+  const findAlert = () => wrapper.findComponent(GlAlert);
 
   describe('Schedule create', () => {
     beforeEach(() => {

ee/spec/frontend/oncall_schedule/delete_schedule_modal_spec.js

@@ -27,9 +27,9 @@ describe('DeleteScheduleModal', () => {
   let fakeApollo;
   let destroyScheduleHandler;
 
-  const findModal = () => wrapper.find(GlModal);
-  const findModalText = () => wrapper.find(GlSprintf);
-  const findAlert = () => wrapper.find(GlAlert);
+  const findModal = () => wrapper.findComponent(GlModal);
+  const findModalText = () => wrapper.findComponent(GlSprintf);
+  const findAlert = () => wrapper.findComponent(GlAlert);
 
   async function awaitApolloDomMock() {
     await wrapper.vm.$nextTick(); // kick off the DOM update
@@ -38,7 +38,7 @@ describe('DeleteScheduleModal', () => {
   }
 
   async function destroySchedule(localWrapper) {
-    localWrapper.find(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
+    localWrapper.findComponent(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
   }
 
   const createComponent = ({ data = {}, props = {} } = {}) => {

ee/spec/frontend/oncall_schedule/oncall_schedule_wrapper_spec.js

@@ -66,15 +66,14 @@ describe('On-call schedule wrapper', () => {
   afterEach(() => {
     if (wrapper) {
       wrapper.destroy();
-      wrapper = null;
     }
   });
 
-  const findLoader = () => wrapper.find(GlLoadingIcon);
-  const findEmptyState = () => wrapper.find(GlEmptyState);
-  const findSchedule = () => wrapper.find(OnCallSchedule);
-  const findAlert = () => wrapper.find(GlAlert);
-  const findModal = () => wrapper.find(AddScheduleModal);
+  const findLoader = () => wrapper.findComponent(GlLoadingIcon);
+  const findEmptyState = () => wrapper.findComponent(GlEmptyState);
+  const findSchedule = () => wrapper.findComponent(OnCallSchedule);
+  const findAlert = () => wrapper.findComponent(GlAlert);
+  const findModal = () => wrapper.findComponent(AddScheduleModal);
 
   it('shows a loader while data is requested', () => {
     mountComponent({ loading: true });

ee/spec/frontend/oncall_schedule/rotations/components/add_edit_rotation_modal_spec.js

@@ -42,7 +42,7 @@ describe('AddEditRotationModal', () => {
   }
 
   async function createRotation(localWrapper) {
-    localWrapper.find(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
+    localWrapper.findComponent(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
   }
 
   const createComponent = ({ data = {}, props = {}, loading = false } = {}) => {

ee/spec/frontend/oncall_schedule/rotations/components/delete_rotation_modal_spec.js

@@ -28,9 +28,9 @@ describe('DeleteRotationModal', () => {
   let fakeApollo;
   let destroyRotationHandler;
 
-  const findModal = () => wrapper.find(GlModal);
-  const findModalText = () => wrapper.find(GlSprintf);
-  const findAlert = () => wrapper.find(GlAlert);
+  const findModal = () => wrapper.findComponent(GlModal);
+  const findModalText = () => wrapper.findComponent(GlSprintf);
+  const findAlert = () => wrapper.findComponent(GlAlert);
 
   async function awaitApolloDomMock() {
     await wrapper.vm.$nextTick(); // kick off the DOM update
@@ -39,7 +39,7 @@ describe('DeleteRotationModal', () => {
   }
 
   async function destroyRotation(localWrapper) {
-    localWrapper.find(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
+    localWrapper.findComponent(GlModal).vm.$emit('primary', { preventDefault: jest.fn() });
   }
 
   const createComponent = ({ data = {}, props = {} } = {}) => {
@@ -109,7 +109,6 @@ describe('DeleteRotationModal', () => {
 
   afterEach(() => {
     wrapper.destroy();
-    wrapper = null;
   });
 
   it('renders delete rotation modal layout', () => {