Basic pluto with IKEv2 using RSA on the initiator (west), and on the responder.

This test adds a bogus ISAKMP RESERVED flag to the payload on the initiator

RFC 5996 Section 2.5:

   Also, for forward compatibility, all fields marked RESERVED MUST be
   set to zero by an implementation running version 2.0, and their
   content MUST be ignored by an implementation running version 2.0

The connection should establish