Solaris 11 support

I've added Solaris 11 support.

Lately, SmartOS and Solaris 10 support were added.
then Solaris 11 which works with commands/solaris.rb should work with commands/solaris11.rb,
and commands/solaris.rb should contain Solaris common commands.

Solaris remains in check_os, 
because I don't know if there is another Solaris family OS (like OpenIndiana) user.