Another round of normalizing Rapid7's names

So, according to some e-mail from Rapid7 folk, Rapid7 is most correctly referred to as Rapid7 Comma Inc.

This PR makes that change. Sorry for the misinformation on #3092, it was only mostly correct.

Also, this PR reflects the transfer of Metasploit LLC assets to Rapid7, Inc.

## Verification

- [ ] No instances of "Metasploit LLC" in the code base.
- [ ] All references to "Rapid7" include the comma and the Inc string (not LLC)