RFR 8164907: Eliminate dependency on java.naming/com.sun.jndi.toolkit.url

[Pavel Rappo]

Hello,

Could you please review the following change for [1]? 

For convenience I split the otherwise monolithic change into 4 separate webrevs.
The first webrev addresses the first part of the task. Which is elimination of
undesirable inter-modular dependencies. There were dependencies on 3 symbols, 
2 utility methods and 1 class:

   http://cr.openjdk.java.net/~prappo/8164907/webrev.00

The remaining 3 webrevs address the second part of the task. Which is coalescing
the CORBA code in a single repo:

   http://cr.openjdk.java.net/~prappo/8164907/dev/
   http://cr.openjdk.java.net/~prappo/8164907/corba/
   http://cr.openjdk.java.net/~prappo/8164907/jdk/    

As far as I can see all related tests are fine.

Thanks,
-Pavel

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[1] https://bugs.openjdk.java.net/browse/JDK-8164907