RFR: 8149450: LdapCtx.processReturnCode() throwing Null Pointer Exception

Looking to fix this issue. Better checks for the referrrals field. bugID : https://bugs.openjdk.java.net/browse/JDK-8149450 webrev : http://cr.openjdk.java.net/~coffeys/webrev.8149450.jdk9/webrev/ regards, Sean.