Clean Raw Data: OpenNTP

[rufuspollock]

This should run AWS.

• [x] Fetch and uncompress
• [x] Sample (?) - maybe at rate 1
• [x] Clean - filter
• [x] Parse - put into standard internal format

[chorsley]

The following filtering possibilities with NTP data have been observed so far:

• [ ] Amplification factor not taken into account yet, though we do have the byte count of responses to help us here.
• [ ] "stratum" value in NTP data might tell us how intentionally the server is designed to be used for public consumption. A value of 16 is unsynchronised (read: completely unreliable) and possibly unintentionally available.

[chorsley]

Closing as data can be processed via ETLv2. Further issues at #48 (processing issues due to file size) and #49 (ideas for further filtering).