8081347: Add @modules to jdk_core tests
Reviewed-by: alanb, joehw, lancea
Contributed-by: alexander.kulyakhtin@oracle.com, alan.bateman@oracle.com, mandy.chung@oracle.com

8074531: Remove javax.security.cert.X509Certificate usage in internal networking packages
Reviewed-by: mullan

8064924: Update java.net.URL to work with modules
Reviewed-by: alanb, plevart, psandoz

8032473: Restructure JSSE regression test hierarchy in jdk test
Reviewed-by: weijun