fixes #2373 - only reference unattended subnet path when in unattended mode
fixes #2684 - add foreman-rake script to /usr/sbin
fixes #2814 - fixing foreman-debug warning message
fixes #2812 - method lookup_values_attributes= not defined in Host::Managed (NameError)
Fixes #2817 - wrong param types in lookup keys API documentation
fixes #2757 - show model validation errors in production.log