Adjust ssl_test_new for SHA1 security level

Adjust ssl_test_new for SHA1 security level

SHA1 is now in security level 0. SHA1 is required for DTLSv1.1. Therefore
ssl_test_new needed some adjustments in the event that DTLSv1.2 is disabled.

There are also adjustments required if using the FIPS module and DTLSv1.2
is disabled. The only DTLS version supported by the FIPS module is
DTLSv1.2.

Fixes  #14956

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15047)