RFR 9+-: 8180582: The bind to rmiregistry is rejected by registryFilter even though registryFilter is set

[Roger Riggs]

Please review an update to the RMI Registry built-in serial filter 
implementation limit on the depth
of a instance that can be bound in the registry.  The initial depth 
limit was 5 and it was too limiting
for some existing applications.  It limit is updated to depth = 20 and 
should be more than adequate.

Webrev:
http://cr.openjdk.java.net/~rriggs/webrev-depth-max-8180582/index.html
Issue:
   https://bugs.openjdk.java.net/browse/JDK-8180582

Thanks, Roger