rootVolumeOnly attribute should not be added when CPACK_PRODUCTBUILD_DOMAINS is enabled
!6825 (merged) added a set of new CPACK_PRODUCTBUILD_DOMAINS*
variables. These replace the need for the deprecated auth
attribute on each pkg-ref
element. According to the Apple documentation, the rootVolumeOnly
attribute of the options
element is also deprecated and is replaced by the domains
element. Currently, we hard-code rootVolumeOnly="false"
, but we should not output that attribute when domains
will be added.