Always include the region param in server monitor requests

The region will naturally be appended to URLs via
token.authorizedRequest but agent members includes all servers across
all regions so relying on the application-level region isn't good
enough.

ui/app/components/agent-monitor.js

@@ -33,10 +33,16 @@ export default class AgentMonitor extends Component {
     const type = this.server ? 'server_id' : 'client_id';
     const id = this.server ? this.server.id : this.client && this.client.id;
 
-    return {
+    const params = {
       log_level: this.level,
       [type]: id,
     };
+
+    if (this.server) {
+      params.region = this.server.region;
+    }
+
+    return params;
   }
 
   didInsertElement() {

ui/tests/integration/components/agent-monitor-test.js

@@ -34,10 +34,10 @@ module('Integration | Component | agent-monitor', function(hooks) {
 
   const commonTemplate = hbs`
     <AgentMonitor
-      @level={{level}}
-      @client={{client}}
-      @server={{server}}
-      @onLevelChange={{onLevelChange}} />
+      @level={{this.level}}
+      @client={{this.client}}
+      @server={{this.server}}
+      @onLevelChange={{this.onLevelChange}} />
   `;
 
   test('basic appearance', async function(assert) {
@@ -61,7 +61,7 @@ module('Integration | Component | agent-monitor', function(hooks) {
   test('when provided with a client, AgentMonitor streams logs for the client', async function(assert) {
     this.setProperties({
       level: 'info',
-      client: { id: 'client1' },
+      client: { id: 'client1', region: 'us-west-1' },
     });
 
     run.later(run, run.cancelTimers, INTERVAL);
@@ -73,12 +73,13 @@ module('Integration | Component | agent-monitor', function(hooks) {
     assert.ok(logRequest.url.includes('client_id=client1'));
     assert.ok(logRequest.url.includes('log_level=info'));
     assert.notOk(logRequest.url.includes('server_id'));
+    assert.notOk(logRequest.url.includes('region='));
   });
 
   test('when provided with a server, AgentMonitor streams logs for the server', async function(assert) {
     this.setProperties({
       level: 'warn',
-      server: { id: 'server1' },
+      server: { id: 'server1', region: 'us-west-1' },
     });
 
     run.later(run, run.cancelTimers, INTERVAL);
@@ -89,6 +90,7 @@ module('Integration | Component | agent-monitor', function(hooks) {
     assert.ok(logRequest.url.startsWith('/v1/agent/monitor'));
     assert.ok(logRequest.url.includes('server_id=server1'));
     assert.ok(logRequest.url.includes('log_level=warn'));
+    assert.ok(logRequest.url.includes('region=us-west-1'));
     assert.notOk(logRequest.url.includes('client_id'));
   });