Use import for JSON fixtures

- ee/spec/frontend/on_demand_scans_form
- ee/spec/frontend/oncall_schedule
- ee/spec/frontend/security_configuration

ee/spec/frontend/on_demand_scans_form/components/scan_schedule_spec.js

 import { GlDatepicker, GlFormCheckbox, GlFormGroup } from '@gitlab/ui';
 import { merge } from 'lodash';
+import mockTimezones from 'test_fixtures/timezones/full.json';
 import ScanSchedule from 'ee/on_demand_scans_form/components/scan_schedule.vue';
 import { SCAN_CADENCE_OPTIONS } from 'ee/on_demand_scans_form/settings';
 import DropdownInput from 'ee/security_configuration/components/dropdown_input.vue';
@@ -7,7 +8,6 @@ import { stubComponent } from 'helpers/stub_component';
 import { shallowMountExtended } from 'helpers/vue_test_utils_helper';
 import TimezoneDropdown from '~/vue_shared/components/timezone_dropdown.vue';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
 const timezoneSST = mockTimezones[2];
 
 describe('ScanSchedule', () => {

ee/spec/frontend/oncall_schedule/add_edit_schedule_form_spec.js

 import { GlSearchBoxByType, GlDropdown, GlDropdownItem, GlFormGroup } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
+import mockTimezones from 'test_fixtures/timezones/full.json';
 import AddEditScheduleForm, {
   i18n,
 } from 'ee/oncall_schedules/components/add_edit_schedule_form.vue';
 import { stubComponent } from 'helpers/stub_component';
 import { getOncallSchedulesQueryResponse } from './mocks/apollo_mock';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
-
 describe('AddEditScheduleForm', () => {
   let wrapper;
   const projectPath = 'group/project';

ee/spec/frontend/oncall_schedule/add_edit_schedule_modal_spec.js

@@ -2,6 +2,7 @@ import { GlModal, GlAlert } from '@gitlab/ui';
 import { createLocalVue, shallowMount } from '@vue/test-utils';
 import { nextTick } from 'vue';
 import VueApollo from 'vue-apollo';
+import mockTimezones from 'test_fixtures/timezones/full.json';
 import AddEditScheduleForm from 'ee/oncall_schedules/components/add_edit_schedule_form.vue';
 import AddEditScheduleModal, {
   i18n,
@@ -19,8 +20,6 @@ import {
   updateScheduleResponseWithErrors,
 } from './mocks/apollo_mock';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
-
 describe('AddScheduleModal', () => {
   let wrapper;
   let fakeApollo;

ee/spec/frontend/oncall_schedule/common_utils_spec.js

+import mockTimezones from 'test_fixtures/timezones/full.json';
 import {
   getFormattedTimezone,
   getParticipantsForSave,
@@ -8,8 +9,6 @@ import {
 } from 'ee/oncall_schedules/utils/common_utils';
 import * as ColorUtils from '~/lib/utils/color_utils';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
-
 describe('getFormattedTimezone', () => {
   it('formats the timezone', () => {
     const tz = mockTimezones[0];

ee/spec/frontend/oncall_schedule/oncall_schedule_spec.js

@@ -2,6 +2,7 @@ import { GlButton, GlCard, GlIcon, GlCollapse } from '@gitlab/ui';
 import { createLocalVue } from '@vue/test-utils';
 import { nextTick } from 'vue';
 import VueApollo from 'vue-apollo';
+import mockTimezones from 'test_fixtures/timezones/full.json';
 import OnCallSchedule, { i18n } from 'ee/oncall_schedules/components/oncall_schedule.vue';
 import RotationsListSection from 'ee/oncall_schedules/components/schedule/components/rotations_list_section.vue';
 import ScheduleTimelineSection from 'ee/oncall_schedules/components/schedule/components/schedule_timeline_section.vue';
@@ -15,8 +16,6 @@ import waitForPromises from 'helpers/wait_for_promises';
 import * as dateTimeUtility from '~/lib/utils/datetime/date_calculation_utility';
 import { getOncallSchedulesQueryResponse } from './mocks/apollo_mock';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
-
 const localVue = createLocalVue();
 localVue.use(VueApollo);
 

ee/spec/frontend/security_configuration/dast_profiles/components/dast_scan_schedule_spec.js

 import { shallowMount } from '@vue/test-utils';
+import mockTimezones from 'test_fixtures/timezones/full.json';
 import DastScanSchedule from 'ee/security_configuration/dast_profiles/components/dast_scan_schedule.vue';
 import { createMockDirective, getBinding } from 'helpers/vue_mock_directive';
 
-const mockTimezones = getJSONFixture('timezones/full.json');
-
 describe('EE - DastScanSchedule', () => {
   let wrapper;