Description of problem:

Error messages in evm.log

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

5.4.0.0.24.20150427192818_1fd9e49

How reproducible:

Unsure

Steps to Reproduce:
1. Discover SCVMM provider
2. Refresh Relationships and Power States
3.

Actual results:

Stack traceback

Expected results:

No error, successful refresh

Additional info:

Receive messages as reported in "See also" followed by:
[----] E, [2015-04-30T08:50:05.656128 #4193:35fea8] ERROR -- : MIQ(EmsRefresh::Refreshers::ScvmmRefresher.refresh) EMS: [SCVMM (10.16.4.133)], id: [1] Refresh failed
[----] E, [2015-04-30T08:50:05.656521 #4193:35fea8] ERROR -- : [NoMethodError]: undefined method `[]' for nil:NilClass  Method:[rescue in block in refresh]
[----] E, [2015-04-30T08:50:05.656706 #4193:35fea8] ERROR -- : /var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:323:in `block in process_snapshots'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:313:in `each'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:313:in `process_snapshots'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:183:in `parse_vm'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:65:in `block in get_vms'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:588:in `block in process_collection'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:587:in `each'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:587:in `process_collection'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:65:in `get_vms'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:32:in `ems_inv_to_hashes'
/var/www/miq/vmdb/app/models/ems_refresh/parsers/scvmm.rb:8:in `ems_inv_to_hashes'
/var/www/miq/vmdb/app/models/ems_refresh/refreshers/scvmm_refresher.rb:10:in `parse_inventory'
/var/www/miq/vmdb/app/models/ems_refresh/refreshers/ems_refresher_mixin.rb:20:in `block in refresh'
/var/www/miq/vmdb/app/models/ems_refresh/refreshers/ems_refresher_mixin.rb:8:in `each'
/var/www/miq/vmdb/app/models/ems_refresh/refreshers/ems_refresher_mixin.rb:8:in `refresh'
/var/www/miq/vmdb/app/models/ems_refresh/refreshers/base_refresher.rb:8:in `refresh'
/var/www/miq/vmdb/app/models/ems_refresh.rb:80:in `block in refresh'
/var/www/miq/vmdb/app/models/ems_refresh.rb:78:in `each'
/var/www/miq/vmdb/app/models/ems_refresh.rb:78:in `refresh'
/var/www/miq/vmdb/app/models/miq_queue.rb:356:in `block in deliver'
/opt/rh/ruby200/root/usr/share/ruby/timeout.rb:66:in `timeout'
/var/www/miq/vmdb/app/models/miq_queue.rb:352:in `deliver'
/var/www/miq/vmdb/lib/workers/queue_worker_base.rb:107:in `deliver_queue_message'
/var/www/miq/vmdb/lib/workers/queue_worker_base.rb:135:in `deliver_message'
/var/www/miq/vmdb/lib/workers/queue_worker_base.rb:152:in `block in do_work'
/var/www/miq/vmdb/lib/workers/queue_worker_base.rb:146:in `loop'
/var/www/miq/vmdb/lib/workers/queue_worker_base.rb:146:in `do_work'
/var/www/miq/vmdb/lib/workers/worker_base.rb:323:in `block in do_work_loop'
/var/www/miq/vmdb/lib/workers/worker_base.rb:320:in `loop'
/var/www/miq/vmdb/lib/workers/worker_base.rb:320:in `do_work_loop'
/var/www/miq/vmdb/lib/workers/worker_base.rb:141:in `run'
/var/www/miq/vmdb/lib/workers/worker_base.rb:122:in `start'
/var/www/miq/vmdb/lib/workers/worker_base.rb:23:in `start_worker'
/var/www/miq/vmdb/lib/workers/bin/worker.rb:3:in `<top (required)>'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands/runner.rb:52:in `eval'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands/runner.rb:52:in `<top (required)>'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands.rb:64:in `require'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands.rb:64:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'
[----] E, [2015-04-30T08:50:05.656795 #4193:35fea8] ERROR -- : MIQ(EmsRefresh::Refreshers::ScvmmRefresher.refresh) EMS: [SCVMM (10.16.4.133)], id: [1] Unable to perform refresh for the following targets:
[----] E, [2015-04-30T08:50:05.656974 #4193:35fea8] ERROR -- :  --- EmsMicrosoft [SCVMM (10.16.4.133)] id [1]