reverting PR #127 and apt preference fix

- reverted PR #127
- updated apt dsc/dse install, i guess

@michaelklishin Is it me or attribute `node['cassandra']['package_name']` is not suppose to be used for `apt-get install` like used for `rhel` platform family.

`node['cassandra']['version']` is used to pin the preference for `cassandra` package.

Also i guess apt `preference` is also required for dse, in which case need to declare it for the platform family not just for `dsc`.