Merge pull request #552 from lfu/prevent_retirement_1702018

Vm retirement is processed by VmRetireRequest state machine.

(cherry picked from commit 3e2fb4b)

https://bugzilla.redhat.com/show_bug.cgi?id=1783361

content/automate/ManageIQ/System/Event/MiqEvent/POLICY.class/request_vm_retire.yaml

@@ -12,9 +12,3 @@ object:
       value: request_vm_retire
   - rel2:
       value: "/System/event_handlers/event_enforce_policy"
-  - rel3:
-      value: "/System/event_handlers/check_policy_prevent"
-  - rel4:
-      value: "/System/Process/parse_provider_category"
-  - rel5:
-      value: "/${/#ae_provider_category}/VM/Lifecycle/Retirement?vm_id=${process#vm_id}"