Rename library to openscap_results_parser

[redhatrises]

• openscap_parser has a connotation that this library is performing as a SCAP validator, content scanner, and/or check engine. This PR removes that incorrect connotation. Other suggestions can be made but openscap_parser is a no-go.

[akofink]

openscap_results_parser indicates that this gem only parses XCCDF test result files, but it also parses XCCDF datastream and tailoring files as well. I'm not sure how "openscap_parser" makes it seem like this gem does any kind of scanning/evaluation. I think the most accurate name would probably be xccdf_parser as it covers all the file types in that spec.

[redhatrises]

openscap_results_parser indicates that this gem only parses XCCDF test result files, but it also parses XCCDF datastream and tailoring files as well. I'm not sure how "openscap_parser" makes it seem like this gem does any kind of scanning/evaluation. I think the most accurate name would probably be xccdf_parser as it covers all the file types in that spec.

I like your sugestion of xccdf_parser because this isn't really an OpenSCAP parser as it doesn't even use OpenSCAP. Will update to make that distinction.

[kbrock]

If you like this idea, probably want to merge this sooner than later.
This is begging to be a conflict magnet.