Remove reflection hack

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/archaius/ConfigurableEnvironmentConfiguration.java

 package org.springframework.cloud.netflix.archaius;
 
-import java.lang.reflect.Field;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 import org.apache.commons.configuration.AbstractConfiguration;
 import org.springframework.core.env.CompositePropertySource;
@@ -16,7 +13,6 @@ import org.springframework.core.env.EnumerablePropertySource;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
 import org.springframework.core.env.StandardEnvironment;
-import org.springframework.util.ReflectionUtils;
 
 /**
  * @author Spencer Gibb
@@ -82,8 +78,7 @@ public class ConfigurableEnvironmentConfiguration extends AbstractConfiguration
     private void extract(String root, Map<String, PropertySource<?>> map,
                          PropertySource<?> source) {
         if (source instanceof CompositePropertySource) {
-            Set<PropertySource<?>> nested = getNestedPropertySources((CompositePropertySource) source);
-            for (PropertySource<?> nest : nested) {
+            for (PropertySource<?> nest : ((CompositePropertySource) source).getPropertySources()) {
                 extract(source.getName() + ":", map, nest);
             }
         }
@@ -92,16 +87,4 @@ public class ConfigurableEnvironmentConfiguration extends AbstractConfiguration
         }
     }
 
-    @SuppressWarnings("unchecked")
-    private Set<PropertySource<?>> getNestedPropertySources(CompositePropertySource source) {
-        try {
-            Field field = ReflectionUtils.findField(CompositePropertySource.class,
-                    "propertySources");
-            field.setAccessible(true);
-            return (Set<PropertySource<?>>) field.get(source);
-        }
-        catch (Exception ex) {
-            return Collections.emptySet();
-        }
-    }
 }

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/ProxyRouteLocator.java

 package org.springframework.cloud.netflix.zuul;
 
-import java.lang.reflect.Field;
 import java.util.Collection;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -16,10 +15,8 @@ import org.springframework.cloud.client.discovery.DiscoveryClient;
 import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
 import org.springframework.cloud.netflix.zuul.ZuulProperties.ZuulRoute;
 import org.springframework.context.ApplicationListener;
-import org.springframework.core.env.CompositePropertySource;
 import org.springframework.util.AntPathMatcher;
 import org.springframework.util.PathMatcher;
-import org.springframework.util.ReflectionUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -36,8 +33,6 @@ public class ProxyRouteLocator implements ApplicationListener<EnvironmentChangeE
 
 	private PathMatcher pathMatcher = new AntPathMatcher();
 
-	private Field propertySourcesField;
-
 	private AtomicReference<Map<String, ZuulRoute>> routes = new AtomicReference<>();
 
 	private Map<String, String> staticRoutes = new LinkedHashMap<String, String>();
@@ -45,13 +40,6 @@ public class ProxyRouteLocator implements ApplicationListener<EnvironmentChangeE
 	public ProxyRouteLocator(DiscoveryClient discovery, ZuulProperties properties) {
 		this.discovery = discovery;
 		this.properties = properties;
-		initField();
-	}
-
-	private void initField() {
-		propertySourcesField = ReflectionUtils.findField(CompositePropertySource.class,
-				"propertySources");
-		propertySourcesField.setAccessible(true);
 	}
 
 	@Override