Description of problem:
Stack strace during retirement of Orchestration Stack for Azure

Version-Release number of selected component (if applicable):
CF 4.0
5.5.3.4.20160407153134_b3e2a83

How reproducible:
Always

Steps to Reproduce:
1. Use an orchestration template or follow
http://www.tigeriq.co/2016/03/02/use-cloudforms-and-orchestration-templates-to-deploy-rhel-on-azure/
2. And provision RHEL 7.2
3. After provisioning, attempt to retire the orchestration stack

Actual results:
Stacktrace in evm.log

Expected results:
No stackstrace. Should be able to retire. 

Additional info:

[----] I, [2016-06-09T23:04:19.425476 #50158:865998]  INFO -- : MIQ(ManageIQ::Providers::Azure::CloudManager::OrchestrationStack#retire_now) calling request_orchestration_stack_retire
[----] I, [2016-06-09T23:04:19.425602 #50158:865998]  INFO -- : Raising Retirement Event for [RHELVM011]
[----] I, [2016-06-09T23:04:19.434707 #50158:865998]  INFO -- : <AutomationEngine> MiqAeEvent.build_evm_event >> event=<"request_orchestration_stack_retire"> inputs=<{:retirement_initiator=>"user", :orchestration_stack=>#<ManageIQ::Providers::Azure::CloudManager::OrchestrationStack id: 57, name: "RHELVM011", type: "ManageIQ::Providers::Azure::CloudManager::Orchestr...", description: "RHELVM011", status: "Failed", ems_ref: "/subscriptions/4d6811f5-fccd-4aff-926e-4620940d343...", ancestry: nil, ems_id: 4, orchestration_template_id: nil, created_at: "2016-06-09 14:43:00", updated_at: "2016-06-09 14:52:45", retired: nil, retires_on: nil, retirement_warn: nil, retirement_last_warn: nil, retirement_state: nil, retirement_requester: "admin", status_reason: nil, cloud_tenant_id: nil, resource_group: "test">, :userid=>"admin", :type=>"ManageIQ::Providers::Azure::CloudManager::OrchestrationStack", "MiqEvent::miq_event"=>5967, :miq_event_id=>5967, "EventStream::event_stream"=>5967, :event_stream_id=>5967}>
[----] E, [2016-06-09T23:04:19.435333 #50158:865998] ERROR -- : [NoMethodError]: undefined method `tenant_identity' for #<ManageIQ::Providers::Azure::CloudManager::OrchestrationStack:0x00000018a0e138>  Method:[rescue in retire_now]
[----] E, [2016-06-09T23:04:19.435452 #50158:865998] ERROR -- : /opt/rh/cfme-gemset/gems/activemodel-4.2.6/lib/active_model/attribute_methods.rb:433:in `method_missing'
/var/www/miq/vmdb/lib/miq_automation_engine/engine/miq_ae_event.rb:114:in `call_automate'
/var/www/miq/vmdb/lib/miq_automation_engine/engine/miq_ae_event.rb:41:in `raise_evm_event'
/var/www/miq/vmdb/app/models/miq_event.rb:43:in `raise_evm_event'
/var/www/miq/vmdb/app/models/mixins/retirement_mixin.rb:168:in `raise_retirement_event'
/var/www/miq/vmdb/app/models/mixins/retirement_mixin.rb:115:in `retire_now'
/var/www/miq/vmdb/app/models/miq_queue.rb:345:in `block in deliver'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:89:in `block in timeout'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `block in catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:104:in `timeout'
/var/www/miq/vmdb/app/models/miq_queue.rb:341:in `deliver'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:106:in `deliver_queue_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:134:in `deliver_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:151:in `block in do_work'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:145:in `loop'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:145:in `do_work'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:334:in `block in do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:331:in `loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:331:in `do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:153:in `run'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:128:in `start'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:29:in `start_worker'
/var/www/miq/vmdb/lib/workers/bin/worker.rb:2:in `<top (required)>'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/runner.rb:60:in `load'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/runner.rb:60:in `<top (required)>'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:123:in `require'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:123:in `require_command!'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:90:in `runner'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
/opt/rh/cfme-gemset/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
/var/www/miq/vmdb/bin/rails:4:in `require'
/var/www/miq/vmdb/bin/rails:4:in `<main>'