[9] RFR 8157667: sun/security/x509/URICertStore/ExtensionsWithLDAP.java has to be updated due to JDK-8134577

[John Jiang]

Hi,
Due to JDK-8134577, the test 
sun/security/x509/URICertStore/ExtensionsWithLDAP.java cannot resolve 
hosts from a local name service provider.
This fix creates a simple Socks4 proxy, and use it to resolve hosts from 
Socket.

Issue: https://bugs.openjdk.java.net/browse/JDK-8157667
Webrev: http://cr.openjdk.java.net/~jjiang/8157667/webrev.01

Please note that, this fix provides two separated local hosts files. 
Each of them contains only one host entry.
And the test is executed twice in deed. Each time, the test focus only 
one specific host, and uses one hosts file accordingly.
If one hosts file includes two entries, like the below,
127.0.0.1 ldap.host.for.crldp
127.0.0.1 ldap.host.for.aia
then, only the first host, ldap.host.for.crldp, is resolved by the proxy.
If I misunderstand something, or you have better solution, please let me 
know.

Thanks!

John Jiang