Create categories option after the scan profile is loaded

https://bugzilla.redhat.com/show_bug.cgi?id=1114063
Refactor call_scan and add tests

https://bugzilla.redhat.com/show_bug.cgi?id=1114063
Refactor coding style

https://bugzilla.redhat.com/show_bug.cgi?id=1114063
Use active_record_instance_double for MiqServer instance stub
Merge pull request #324 from eclarizio/fix_widget_importer_spec

Use active_record_instance_double for MiqServer instance stub
SCVMM scheduled EMS refresh.

A mechanism was needed to refresh the SCVMM provider given that event support will not be in the 3.1 release. I have configured a 4 minute schedule but am open to negotiation on the frequency. On one hand we need to bear in mind that an EMS refresh can take more than 4 minutes but on the other hand we can't wait too long after a VM power operation.
Merge pull request #308 from bronaghs/scvmm_refresh_schedule

SCVMM scheduled EMS refresh.
Merge pull request #111 from bzwei/customer_profile

Add profiles to categories option when a customer profile is included