Fixed the typo causing a Rbac issue in Hosts->Analyze & Check Compliance

Also applicable to #243
New method cloneable? to check if VMs/Templates can be cloned or not

issue #253
https://bugzilla.redhat.com/show_bug.cgi?id=1122712
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)
Merge pull request #287 from AparnaKarve/bz1122712_vm_clone_issue

Added a new method cloneable? to check if VMs/Templates can be cloned or not
Merge pull request #315 from AparnaKarve/hosts_analyze_chk_complaince_rbac_issue

Fixed the typo causing a Rbac issue in Hosts->Analyze & Check Compliance
Merge pull request #312 from abellotti/rest_api_service_requests_tasks

REST API Support for Service Requests as subcollections
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.