This test is out of date with respect to the latest signed key rotation rules
implemented in b92dd45 and 536dd7b. Previously we would only keep the last two
signed keys, but now we keep at least three as well as requiring a minimum
retention period. As a result, this test should be failing, but we haven't
noticed because it's not using the `done` parameter to signal its asynchronous
nature.
// FREEBIE
* Session records are now opaque strings, so treat them that way:
- no more cross checking identity key and session records
- Move hasOpenSession to axolotl wrapper
- Remote registration ids must be fetched async'ly via protocol wrapper
* Implement async AxolotlStore using textsecure.storage
* Add some db stores and move prekeys and signed keys to indexeddb
* Add storage tests
* Rename identityKey storage key from libaxolotl25519KeyidentityKey to
simply identityKey, since it's no longer hardcoded in libaxolotl
* Rework registration and key-generation, keeping logic in libtextsecure
and rendering in options.js.
* Remove key_worker since workers are handled at the libaxolotl level
now
