refs #1067 Link to Foreman issue tracker opens in a new window

fixes #1085 - add default domain and subnet settings to hostgroups

fixes #1093 - undefined method

Fixes #1095 - Vendor_class error reporting is incorrect

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

fixes #1097 - 500 ERROR could be generated when User.current is not set

fixes #1096 - limit libvirt hypervisor connection time

refs #1067 - Error message should show trace too

fixes #1067 - Expose error messages in the web GUI

fixes #1092 - hostgroup should not look for parent hostgroups if they do not exists

fixes #1091 - hosts should not use pre initializer for users