SSLSession inconsistencies

SSLSessions obtained after an initial connection may return a null value when its getSessionContext() method is called. This appears to happen with both SSLSocket and SSLEngine objects.

Pulling the SSLSession after a resumption does return a non-null SSLSessionContext object when getSessionContext is called. Setting jdk.tls.server.enableSessionTicketExtension=false also appears to work around the issue.

A modified version of the original reproducer code has been attached. The original reproducer can be found at:
https://github.com/normanmaurer/jdk_ssl_session_context_reproducer

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Also added to this bug not related to netty:
- An unnecessary add to the session cache for 1.3 w/ state
- Fix to the stateless session data that can corrupt the SSLSession getPeerHost and getPeerPort