i18n, vue-router and vuex upgrade

1. Configuration of i18n legacy as false.
2. Translation function t is called using the useI18n.
3. Used the i18n.global.t() function from i18n instead of this.$t()
4. Event bus error that occurred during logout.
5. Implemented vue-router 4.4.0 and vuex upgrade to 4.1.0

Change-Id: I9464d82c76dcc1445ce271983ea3ab9d7b03d265
Signed-off-by: Surya Venkatesan <suryav@ami.com>
diff --git a/src/components/Global/TableToolbarExport.vue b/src/components/Global/TableToolbarExport.vue
index 69646ea..c678555 100644
--- a/src/components/Global/TableToolbarExport.vue
+++ b/src/components/Global/TableToolbarExport.vue
@@ -10,6 +10,7 @@
 </template>
 
 <script>
+import { useI18n } from 'vue-i18n';
 export default {
   props: {
     data: {
@@ -21,6 +22,11 @@
       default: 'data',
     },
   },
+  data() {
+    return {
+      $t: useI18n().t,
+    };
+  },
   computed: {
     dataForExport() {
       return JSON.stringify(this.data);