Remember key aliases for OpenSSLKeys from ENGINEs

Since it's not easy (or sometimes impossible) to retrieve key IDs for
keys loaded from an ENGINE, remember them when we create them.

(cherry-picked from 86bdaf9b40263efae243d685d449e1ae30b0b161)

Change-Id: I3920f56214d9eade87d51d30b024f5aeda9e8344
4 files changed