test_user_random.yml: Use result.failed also for failed_when

For failed_when result.failed should be used to make sure that
the task fails if there was an error.

tests/user/test_user_random.yml

@@ -22,7 +22,8 @@
       update_password: on_create
     register: ipauser
     failed_when: not ipauser.changed or
-                 ipauser.user.randompassword is not defined
+                 ipauser.user.randompassword is not defined or
+                 ipauser.failed
 
   - name: Print generated random password
     debug:
@@ -35,7 +36,7 @@
       - user1
       state: absent
 
-  - name: Users user1 and user1 present with random password
+  - name: Users user1 and user2 present with random password
     ipauser:
       ipaadmin_password: SomeADMINpassword
       users:
@@ -51,7 +52,8 @@
     register: ipauser
     failed_when: not ipauser.changed or
                  ipauser.user.user1.randompassword is not defined or
-                 ipauser.user.user2.randompassword is not defined
+                 ipauser.user.user2.randompassword is not defined or
+                 ipauser.failed
 
   - name: Print generated random password for user1
     debug: