Allow the creation of versions in Packages
by specifying a dummy Package to allow the
extended policy checks to pass. Versions
require that the package they're a version
of be accessible to the viewer, but that
means a package is required during creation.
This also initializes the attached package
property to the un-attached state, which
was missing. This should make it easier to
fix when misused.
Currently trying to create versions in Packages throws:
EXCEPTION: (Error) Call to a member function getPHID() on null at [<phorge>/src/applications/policy/filter/PhabricatorPolicyFilter.php:404]