Switch fileformat to unix, clean up whitespace.

Converts a few files from CRLF->LF.
Removes some trailing whitespace as well.
Cleanup dsc_script_spec to use newer rspec conventions
Merge pull request #1968 from opscode/jdmundrawala/dsc-script-provider-test-cleanup

Cleanup dsc_script_spec to use newer rspec conventions
Added test for #generate_description in provider/dsc_script_spec
Merge pull request #1953 from opscode/jdmundrawala/generate_description-test

Added test for #generate_description in provider/dsc_script_spec
configuration_generator_spec uses newer rspec conventions