Empty and filled task exec screenshots for test (#14702)

* Empty and filled task exec screenshots for test

* Attempting to stabilize datacenter prop on servers

ui/tests/acceptance/exec-test.js

@@ -7,6 +7,8 @@ import a11yAudit from 'nomad-ui/tests/helpers/a11y-audit';
 import Service from '@ember/service';
 import Exec from 'nomad-ui/tests/pages/exec';
 import KEYS from 'nomad-ui/utils/keys';
+import percySnapshot from '@percy/ember';
+import faker from 'nomad-ui/mirage/faker';
 
 module('Acceptance | exec', function (hooks) {
   setupApplicationTest(hooks);
@@ -16,6 +18,8 @@ module('Acceptance | exec', function (hooks) {
     window.localStorage.clear();
     window.sessionStorage.clear();
 
+    faker.seed(1);
+
     server.create('agent');
     server.create('node');
 
@@ -95,6 +99,8 @@ module('Acceptance | exec', function (hooks) {
     assert.notOk(Exec.taskGroups[0].tasks[0].isActive);
     assert.ok(Exec.taskGroups[0].chevron.isDown);
 
+    await percySnapshot(assert);
+
     await Exec.taskGroups[0].click();
     assert.equal(Exec.taskGroups[0].tasks.length, 0);
   });
@@ -290,6 +296,8 @@ module('Acceptance | exec', function (hooks) {
         allocationId.split('-')[0]
       } /bin/bash`
     );
+
+    await percySnapshot(assert);
   });
 
   test('an allocation can be specified', async function (assert) {

ui/tests/acceptance/servers-list-test.js

@@ -11,6 +11,7 @@ import percySnapshot from '@percy/ember';
 import faker from 'nomad-ui/mirage/faker';
 
 const minimumSetup = () => {
+  faker.seed(1);
   server.createList('node', 1);
   server.createList('agent', 1);
 };