This fix updates three tests: sun/net/ftp/FtpURL.java, sun/net/ftp/FtpURLConnectionLeak.java, and sun/net/ftp/FtpGetContent.java, to work with IPv6 addresses
Reviewed-by: chegar, aeubanks, vtewari
Makes a few intermittently failing tests more resilient to port reuse issues by ensuring they bind to the loopback address instead of the wildcard.
Reviewed-by: alanb, chegar