Add RenewTicketOnResume tests.

Didn't have coverage for abbreviated handshakes with NewSessionTicket. Also add
some missing resumeSession flags so the tests match the comments.

Change-Id: Ie4d76e8764561f3f1f31e1aa9595324affce0db8
Reviewed-on: https://boringssl-review.googlesource.com/1453
Reviewed-by: Adam Langley <agl@google.com>
3 files changed