refactor: convert vue filters to utils in test files regarding deprec…

…ation notice

- vue filters are deprecated un vue3

frontend/tests/unit/Tracers.spec.js

@@ -21,11 +21,6 @@ localVue.use(Buefy)
 localVue.use(Vuex)
 
 localVue.component('font-awesome-icon', FontAwesomeIcon)
-localVue.filter('capitalize', function(value) {
-  if (!value) return ''
-  value = value.toString()
-  return value.charAt(0).toUpperCase() + value.slice(1)
-})
 
 describe('Tracers.vue', () => {
   let store

frontend/tests/unit/TracersGrid.spec.js

@@ -5,7 +5,6 @@ import pages from '../../src/store/modules/pages'
 import tracers from '../../src/store/modules/tracers'
 import Buefy from 'buefy'
 import VueRouter from 'vue-router'
-import moment from 'moment'
 import tracersData from './data/tracers'
 import i18n from '../../src/i18n'
 
@@ -17,10 +16,6 @@ localVue.use(Buefy)
 localVue.use(Vuex)
 localVue.use(VueRouter)
 
-localVue.filter('formatDate', value =>
-  moment(String(value)).format('MM/DD/YYYY')
-)
-
 const router = new VueRouter()
 
 describe('Page.vue', () => {

frontend/tests/unit/TracersList.spec.js

@@ -6,7 +6,6 @@ import tracers from '../../src/store/modules/tracers'
 import Buefy from 'buefy'
 import VueRouter from 'vue-router'
 import i18n from '../../src/i18n'
-import moment from 'moment'
 import tracersData from './data/tracers'
 
 VueTestUtils.config.mocks.$t = key => key
@@ -16,9 +15,6 @@ const localVue = VueTestUtils.createLocalVue()
 localVue.use(Buefy)
 localVue.use(Vuex)
 localVue.use(VueRouter)
-localVue.filter('formatDate', value =>
-  moment(String(value)).format('MM/DD/YYYY')
-)
 
 const router = new VueRouter()