RethinkDB: Changes for v1 RethinkDB driver

[codepope]

Updated for RethinkDB driver 1.0
Changed Db to DB mostly.

[nstott]

Thanks for this
Probably important to note that this version of the rethink driver only supports newer rethinkdb versions,
from the README:
Please note that this version of the driver only supports versions of RethinkDB using the v0.4 protocol (any versions of the driver older than RethinkDB 2.0 will not work).

[jipperinbham]

this line needs to be updated, https://github.com/compose/transporter/blob/master/pkg/adaptor/rethinkdb.go#L113

[codepope]

But @jipperinbham doesn't that just ensure that the tail functionality needed is present (i.e. that the server is greater than 1.16 when all the change feed stuff landed officially)? If so, then just checking you have 1.16 should be correct, though, if a protocol check (for 0.4) is added earlier, never got to.