Bug 1516573

Description of problem:
----------------------
I ran into this error while generating Chargeback reports for cloud volumes.
My appliance was managing AWS.

[----] E, [2017-11-22T14:49:22.390846 #13241:74313c] ERROR -- : [NoMethodError]: undefined method `*' for nil:NilClass  Method:[block in method_missing]
[----] E, [2017-11-22T14:49:22.391042 #13241:74313c] ERROR -- : /var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:104:in `block in find_rate'
/opt/rh/cfme-gemset/gems/activerecord-5.0.6/lib/active_record/relation/delegation.rb:38:in `each'
/opt/rh/cfme-gemset/gems/activerecord-5.0.6/lib/active_record/relation/delegation.rb:38:in `each'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:104:in `detect'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:104:in `find_rate'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:123:in `hourly_cost'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:228:in `metric_and_cost_by'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:90:in `charge'
/var/www/miq/vmdb/app/models/chargeback.rb:137:in `block (2 levels) in calculate_costs'
/var/www/miq/vmdb/app/models/chargeback.rb:136:in `each'
/var/www/miq/vmdb/app/models/chargeback.rb:136:in `block in calculate_costs'
/var/www/miq/vmdb/app/models/chargeback.rb:135:in `each'
/var/www/miq/vmdb/app/models/chargeback.rb:135:in `calculate_costs'
/var/www/miq/vmdb/app/models/chargeback.rb:33:in `block in build_results_for_report_chargeback'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:27:in `block (2 levels) in for_report'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:25:in `each'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:25:in `block in for_report'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:9:in `each'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:9:in `each_cons'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:9:in `for_report'
/var/www/miq/vmdb/app/models/chargeback.rb:20:in `build_results_for_report_chargeback'
/var/www/miq/vmdb/app/models/chargeback_vm.rb:62:in `build_results_for_report_ChargebackVm'
/var/www/miq/vmdb/app/models/miq_report/generator.rb:199:in `_generate_table'
/var/www/miq/vmdb/app/models/miq_report/generator.rb:173:in `block in generate_table'
/var/www/miq/vmdb/app/models/user.rb:246:in `with_user'
/var/www/miq/vmdb/app/models/miq_report/generator.rb:173:in `generate_table'
/var/www/miq/vmdb/app/models/miq_report/generator/async.rb:94:in `_async_generate_table'
/var/www/miq/vmdb/app/models/miq_queue.rb:449:in `block in dispatch_method'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:91:in `block in timeout'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `block in catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:106:in `timeout'
/var/www/miq/vmdb/app/models/miq_queue.rb:448:in `dispatch_method'
/var/www/miq/vmdb/app/models/miq_queue.rb:425:in `block in deliver'
/var/www/miq/vmdb/app/models/user.rb:253:in `with_user_group'
/var/www/miq/vmdb/app/models/miq_queue.rb:425:in `deliver'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:104: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:152:in `block in do_work'


Version-Release number of selected component (if applicable):
-------------------------------------------------------------
5.9.0.9


How reproducible:
-----------------
Always


Steps to Reproduce:
-------------------
1.Manage a cloud provider with cloud volumes.
2.Enable C&U collection for the provider.
3.Generate a Chargeback report so that the report includes storage allocated costs for relevant volume types.


Actual results:
---------------
error while generating Chargeback reports.


Expected results:
-----------------
Chargeback reports should be successfully run.


Additional info:
----------------