Fixing UI tests (#20386)

Fixing tests as we're not calling env.var, we're using a property on the env service

ui/packages/consul-ui/tests/integration/components/link-to-hcp-banner-test.js

@@ -100,9 +100,8 @@ module('Integration | Component | link-to-hcp-banner', function (hooks) {
     this.owner.register(
       'service:env',
       class Stub extends EnvStub {
-        stubEnv = {
-          isEnterprise: true,
-        };
+        stubEnv = {};
+        isEnterprise = true;
       }
     );
     this.linkData = { isLinked: false };