REST API Support for Service Requests as subcollections

- Supporting /api/service_templates/#/service_requests
- Supporting /api/service_templates/#/service_requests/#
- Supporting /api/service_templates/#/service_requests/# --expand=request_tasks
- Supporting /api/service_requests/#/request_tasks (or tasks)
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
Merge pull request #312 from abellotti/rest_api_service_requests_tasks

REST API Support for Service Requests as subcollections
Remove root object logging from service class update status method.
Use active_record_instance_double for MiqServer instance stub
Modified class schema entries and methods for status_state change.

Removed references to status_state on update_*_status method calls and
modified methods to get new root attribute instead of input value.
Set new workspace root attribute ae_status_state to method name.

The on_entry, on_exit, and on_error state machine methods usually
pass 2 required parameters to the update_*_status methods; status
and status_state. The addition of this new attribute will negate the
need to pass status_state, simplifying the method calls.
Merge pull request #304 from tinaafitz/new_miq_ae_object_status_state

Automate - add new workspace root attribute ae_status_state(on_entry, on_exit, on_error)
Merge pull request #323 from tinaafitz/service_method_change

Remove root object logging from service class update status method.
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
Converted image-based form buttons to Patternfly btn class buttons