(CFACT 70) Correct the operating system resolver to match facter

Previously, cfacter output for osfamily (SunOS), operatingsystemrelease(5.10),
and operatingsystem (SunOS) depended on the posix implementation. However,
the ruby facter implementation provides osfamily (Solaris),
operatingsystemrelase (10_u11), and operatingsystem (Solaris) which are
different from the barebones posix. This patch corrects the cfacter so that
it outputs values matching ruby facter.