Complications due to EmailField width handling

[dvogel]

MySQL silently truncates character fields while PostgreSQL raises a DatabaseError exception. Since the key is queued for replication without a round trip to the database, this can cause problems for api servers using PostgreSQL while syncing with a hub that uses MySQL.

• The EmailField max_length setting should be 254 (currently 75) on both the hub and the server in order to mitigate the truncation.
• The queued task that replicates the key should pull the key from the database. This will ensure that the api servers have the same email address as the hub does, truncated or otherwise.