Print status timestamps in UTC

Otherwise when you run tests they may fail depending on the local
timezone. Not 100% sure if the user experience is better with local
times or UTC, but that can be considered in a follow-up.

cmd/svcat/output/output.go

@@ -41,6 +41,7 @@ func formatStatusFull(condition string, conditionStatus v1beta1.ConditionStatus,
 	if status == "" {
 		return ""
 	}
+
 	message = strings.TrimRight(message, ".")
-	return fmt.Sprintf("%s - %s @ %s", status, message, timestamp)
+	return fmt.Sprintf("%s - %s @ %s", status, message, timestamp.UTC())
 }

cmd/svcat/testdata/output/describe-binding.txt

@@ -1,4 +1,4 @@
   Name:        ups-binding                                                   
   Namespace:   test-ns                                                       
-  Status:      Ready - Injected bind result @ 2018-01-11 15:00:47 -0600 CST  
+  Status:      Ready - Injected bind result @ 2018-01-11 21:00:47 +0000 UTC  
   Instance:    ups-instance                                                  

cmd/svcat/testdata/output/describe-broker.txt

@@ -1,3 +1,3 @@
   Name:     ups-broker                                                                                
   URL:      http://ups-broker-ups-broker.ups-broker.svc.cluster.local                                 
-  Status:   Ready - Successfully fetched catalog entries from broker @ 2018-01-11 14:53:31 -0600 CST  
+  Status:   Ready - Successfully fetched catalog entries from broker @ 2018-01-11 20:53:31 +0000 UTC  

cmd/svcat/testdata/output/describe-instance.txt

@@ -1,6 +1,6 @@
   Name:        ups-instance                                                                       
   Namespace:   test-ns                                                                            
-  Status:      Ready - The instance was provisioned successfully @ 2018-01-11 14:59:47 -0600 CST  
+  Status:      Ready - The instance was provisioned successfully @ 2018-01-11 20:59:47 +0000 UTC  
   Class:       user-provided-service                                                              
   Plan:        default