Ensure serialization format is independent of version of BouncyCastle on
the classpath
CloudBees Internal Ticket: RM-1786
java.lang.LinkageError: loader constraint violation: when resolving
overridden method
Known issues
Persisted data format has changed in a non-backwards compatible way.
After upgrading to 4.0, downgrading to previous versions will result in
any "Self-certified" update centers to get a new key and certificate