Add some more PSK tests
Add some more PSK tests

Test that if the server selects a ciphersuite with a different hash from
the PSK in the original ClientHello, the second ClientHello does not
contain the PSK.

Reviewed-by: Rich Salz <c04971a99e5a9ee80eaab4b1deb37e845b0bd697@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)
openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl