UP-3626 Complete consolidation of impersonation logic
UP-3630 Switch to base64 string in varchar

Switch from byte[] for member address data base64 and
store in varchar. This resolves a problem with MySQL
and byte[] as part of a key
Revert "UP-3624"

This reverts commit b945f87d0e32b557212c43b28a9e11664edea5f4.
Revert "UP-3624"

This reverts commit 2ca8ec80e898f68917b45b328dda84e89b9b9ad6.