Update imports as per gitlab-ui 1.9.0 upgrade

ee/app/assets/javascripts/security_dashboard/components/security_dashboard_table_row.vue

 <script>
-import { SkeletonLoading } from '@gitlab-org/gitlab-ui';
+import { GlSkeletonLoading } from '@gitlab-org/gitlab-ui';
 import SeverityBadge from 'ee/vue_shared/security_reports/components/severity_badge.vue';
 import SecurityDashboardActionButtons from './security_dashboard_action_buttons.vue';
 import VulnerabilityIssueLink from './vulnerability_issue_link.vue';
@@ -9,7 +9,7 @@ export default {
   components: {
     SeverityBadge,
     SecurityDashboardActionButtons,
-    SkeletonLoading,
+    GlSkeletonLoading,
     VulnerabilityIssueLink,
   },
   props: {
@@ -67,7 +67,7 @@ export default {
         {{ s__('Reports|Vulnerability') }}
       </div>
       <div class="table-mobile-content">
-        <skeleton-loading
+        <gl-skeleton-loading
           v-if="isLoading"
           class="mt-2 js-skeleton-loader"
           :lines="2"

ee/app/assets/javascripts/vue_shared/license_management/components/add_license_form.vue

 <script>
-import { Button } from '@gitlab-org/gitlab-ui';
+import { GlButton } from '@gitlab-org/gitlab-ui';
 import { LICENSE_APPROVAL_STATUS } from '../constants';
 import AddLicenseFormDropdown from './add_license_form_dropdown.vue';
 import { s__ } from '~/locale';
@@ -8,7 +8,7 @@ export default {
   name: 'AddLicenseForm',
   components: {
     AddLicenseFormDropdown,
-    glButton: Button,
+    GlButton,
   },
   LICENSE_APPROVAL_STATUS,
   approvalStatusOptions: [

ee/app/assets/javascripts/vue_shared/license_management/license_management.vue

 <script>
 import { mapState, mapActions } from 'vuex';
-import { Button } from '@gitlab-org/gitlab-ui';
+import { GlButton } from '@gitlab-org/gitlab-ui';
 import { s__ } from '~/locale';
 import AddLicenseForm from './components/add_license_form.vue';
 import LicenseManagementRow from './components/license_management_row.vue';
@@ -15,7 +15,7 @@ export default {
     AddLicenseForm,
     DeleteConfirmationModal,
     LicenseManagementRow,
-    glButton: Button,
+    GlButton,
   },
   props: {
     apiUrl: {