ConfigurationConverter does not handle CompositeConfiguration correctly
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                 Key: CONFIGURATION-339
                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-339
             Project: Commons Configuration
          Issue Type: Bug
          Components: Interpolation
    Affects Versions: 1.5
         Environment: OS X 10.5.5, java version "1.6.0_07", Java(TM) SE Runtime 
Environment (build 1.6.0_07-b06-153)

            Reporter: William DeMoss II


ConfigurationConverter doesn't seem to respect the ordering of a composite 
configuration. I am having problems describing the behavior, but I thinks the 
following test case illustrates it best:

        @Test
        public void showBug() {
                PropertiesConfiguration p = new PropertiesConfiguration();
                p.addProperty("foo", "initial");
                p.addProperty("bar", "${foo}");
                p.addProperty("prefix.foo", "override");

                CompositeConfiguration cfg = new CompositeConfiguration();
                cfg.addConfiguration(p.subset("prefix"));
                cfg.addConfiguration(p);

                // this assertion passes as expected since the subset
                // was added first to the composite configuration
                Assert.assertEquals("override", cfg.getString("bar"));

                // after converting to properties, this assertion fails and
                // reports that the value is 'initial'
                Properties properties = 
ConfigurationConverter.getProperties(cfg);
                Assert.assertEquals("override", properties.getProperty("bar"));
        }

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