add exherbo

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
Merge branch 'OHAI-570'
relax regex to match newer Oracle Solaris releases

All Oracle-branded Solaris versions match the solaris2 platform in ohai.
add test for solaris2 platform
Merge branch 'OHAI-563'
OHAI-570, OHAI-563: Release Notes