[rfc][icedtea-web] Extract JNLPClassLoader#CodeBaseClassLoader as non-inner class

[Adam Domurad]

  JNLPClassLoader.java needs some components broken off, and this is an 
easy start.

This changes no functionality, the class has simply been moved and 
references updated.
Note that the class can not be made package-private as would be ideal, 
because of a reference in PluginAppletViewer.java.

ChangeLog:
2012-10-02  Adam Domurad  <adomurad at redhat.com>

     Extract out JNLPClassLoader#CodeBaseClassLoader as a non-inner class.
     * netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java: Extracted 
CodeBaseClassLoader out.
     * netx/net/sourceforge/jnlp/runtime/CodeBaseClassLoader.java: New, put
     CodeBaseClassLoader here.
     * netx/net/sourceforge/jnlp/runtime/JNLPSecurityManager.java: Updated
     CodeBaseClassLoader reference to correct location.
     * plugin/icedteanp/java/sun/applet/PluginAppletViewer.java: Updated
     CodeBaseClassLoader reference to correct location.
     * 
tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java:
     Updated CodeBaseClassLoader reference to correct location.