(CFACT-123) Add chassis_type fact

Adds (chassis_)type fact on Solaris for parity with facter.
(CFACT-123) Add chassis_asset_tag fact

Adds chassis_asset_tag fact on Solaris for parity with other platforms.
Merge pull request #192 from MikaelSmith/task/bug/CFACT-123-add-chassis_type

(CFACT-123) Add chassis_type fact