Fixes #6756 - exposes vmware resource pools and folders through the API

Fixes #6608 - expose disk usage info through available_storage_domains API

Fixes #5734 - API for external groups management

Fixes #6446 - Forbidding non-json POST/PUT requests in v2

fixes #4155 - enable host/CR (dis)association via api

Fixes #6532 - permission related api extensions

- usergroups#show lists associated roles
 - listing available resource types
 - filters#show lists associated roles
 - filters#index lists associated roles and permissions and orders the results
 - pagination in permissions#index...

fixes #4250 - API v2 - add compute profiles

fixes #4204 - add config groups feature - assign multiple config groups to a host or hostgroup

fixes #1809 - foreman realm integration

fixes #4457 - Session fixation, new session IDs are not generated on login (CVE-2014-0090)