fixes #4290 add validation for user group max name length of 255
fixes #3996 Support to assign both cores and CPUs to VMWare guests
fixes #4442 - returning nil plays nice with try_to_login.
fixes #4194, #4459 - add main_app to root_path references for isolated engines
fixes #4583 - Added Environment name to rundeck output
fixes #3221 - add missing attributes to hostgroup show response
fixes #4485 prevents undefined method when cloning a host
fixes #4581 Implement available_networks API for VMware
fixes #4565 - puppet class free-text search is now significantly faster
fixes #3475 - make it possible to force the 401 status.
fixes #3827 - adds ldap avatar support
fixes #4625 - ensures alerts can have close opt disabled
fixes #4123 - libvirt imaging support using backing volumes