Add salt to hashed PII

[Bento007]

Currently the key used for linking object in cloud directory is a hash of the users name. Sometimes the users name is the user's email which is considered personally identifiable information (PII). To prevent a malicious user who has access to the directory from guess the users hash in cloud directory a random secret key must be added to all emails before hashing. This will make it more difficult for someone to guess the users hash. This will involve migrating existing users in the data base to a salted hash.

[Bento007]

The DCP AWS account must first be compromised before cloud directory can be compromised. This is a low risk issue.