Description of problem:
With aws as a cloud provider, events do not to trigger retirement and spawn errors. Manual retirement through the GUI is functional, can be confirmed on aws and generates no errors.

Version-Release number of selected component (if applicable):
cfme-5.5.2.4-1.el7cf.x86_64

How reproducible:
add aws as cloud provider

Steps to Reproduce:
1. add aws as cloud provider
2. provision an aws instance
3. create a policy with event add tag
4. add action "retire virtual machine"
5. add tag to instance

Actual results:
the instance has no state change, and evm.log shows errors

Expected results:
the instance should be retired

Additional info:
/var/www/miq/vmdb/log/evm.log

```
[----] E, [2016-02-09T10:14:14.783605 #23762:4d1994] ERROR -- : MIQ(miq_policy_controller-condition_edit): Description can't be blank
[----] E, [2016-02-09T10:46:22.663279 #23741:89d988] ERROR -- : MIQ(MiqQueue#m_callback) Message id: [2000000067473]: undefined method `vm_suspend' for #<ManageIQ::Providers::Amazon::CloudManager:0x000000061a14d0>
[----] E, [2016-02-09T11:09:40.609267 #23747:2e682a8] ERROR -- : <AutomationEngine> <AEMethod start_retirement> VM is in the process of being retired. Aborting current State Machine.
[----] E, [2016-02-09T11:09:40.630750 #23747:1173990] ERROR -- : <AutomationEngine> State=<StartRetirement> running  raised exception: <Method exited with rc=MIQ_ABORT>
[----] E, [2016-02-09T11:09:41.346875 #23747:1173990] ERROR -- : MIQ(MiqAeEngine.deliver) Error delivering {:event_type=>"request_vm_retire", "VmOrTemplate::vm"=>2000000000309, :vm_id=>2000000000309, :retirement_initiator=>"system", :host=>nil, :type=>"ManageIQ::Providers::Amazon::CloudManager::Vm", "MiqEvent::miq_event"=>2000000001345, :miq_event_id=>2000000001345, "EventStream::event_stream"=>2000000001345, :event_stream_id=>2000000001345} for object [ManageIQ::Providers::Amazon::CloudManager::Vm.2000000000309] with state [] to Automate: 
[----] E, [2016-02-09T11:10:10.322261 #23762:4d1994] ERROR -- : MIQ(ops_controller-ce_accept): Name must be lowercase alphanumeric characters and underscores without spaces
[----] E, [2016-02-09T11:10:57.960074 #23744:73399cc] ERROR -- : <AutomationEngine> <AEMethod start_retirement> VM is in the process of being retired. Aborting current State Machine.
[----] E, [2016-02-09T11:10:57.986927 #23744:36b988] ERROR -- : <AutomationEngine> State=<StartRetirement> running  raised exception: <Method exited with rc=MIQ_ABORT>
[----] E, [2016-02-09T11:10:58.113006 #23741:e4e3c8] ERROR -- : <AutomationEngine> <AEMethod start_retirement> VM is in the process of being retired. Aborting current State Machine.
[----] E, [2016-02-09T11:10:58.142092 #23741:89d988] ERROR -- : <AutomationEngine> State=<StartRetirement> running  raised exception: <Method exited with rc=MIQ_ABORT>
[----] E, [2016-02-09T11:10:58.867984 #23744:36b988] ERROR -- : MIQ(MiqAeEngine.deliver) Error delivering {:event_type=>"request_vm_retire", "VmOrTemplate::vm"=>2000000000309, :vm_id=>2000000000309, :retirement_initiator=>"system", :host=>nil, :type=>"ManageIQ::Providers::Amazon::CloudManager::Vm", "MiqEvent::miq_event"=>2000000001348, :miq_event_id=>2000000001348, "EventStream::event_stream"=>2000000001348, :event_stream_id=>2000000001348} for object [ManageIQ::Providers::Amazon::CloudManager::Vm.2000000000309] with state [] to Automate: 
[----] E, [2016-02-09T11:10:59.146560 #23741:89d988] ERROR -- : MIQ(MiqAeEngine.deliver) Error delivering {:event_type=>"request_vm_retire", "VmOrTemplate::vm"=>2000000000309, :vm_id=>2000000000309, :retirement_initiator=>"system", :host=>nil, :type=>"ManageIQ::Providers::Amazon::CloudManager::Vm", "MiqEvent::miq_event"=>2000000001349, :miq_event_id=>2000000001349, "EventStream::event_stream"=>2000000001349, :event_stream_id=>2000000001349} for object [ManageIQ::Providers::Amazon::CloudManager::Vm.2000000000309] with state [] to Automate: 
```