Always use 'this.' when accessing fields

Ensure that `this.` is used consistently when accessing class
fields.

Issue: SPR-16968

spring-context-support/src/main/java/org/springframework/cache/caffeine/CaffeineCache.java

@@ -159,10 +159,10 @@ public class CaffeineCache extends AbstractValueAdaptingCache {
 		@Override
 		public Object apply(Object o) {
 			try {
-				return toStoreValue(valueLoader.call());
+				return toStoreValue(this.valueLoader.call());
 			}
 			catch (Exception ex) {
-				throw new ValueRetrievalException(o, valueLoader, ex);
+				throw new ValueRetrievalException(o, this.valueLoader, ex);
 			}
 		}
 	}

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/CacheResolverAdapter.java

@@ -53,7 +53,7 @@ class CacheResolverAdapter implements CacheResolver {
 	 * that this instance is using.
 	 */
 	protected javax.cache.annotation.CacheResolver getTarget() {
-		return target;
+		return this.target;
 	}
 
 	@Override

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/DefaultCacheKeyInvocationContext.java

@@ -48,12 +48,12 @@ class DefaultCacheKeyInvocationContext<A extends Annotation>
 
 	@Override
 	public CacheInvocationParameter[] getKeyParameters() {
-		return keyParameters.clone();
+		return this.keyParameters.clone();
 	}
 
 	@Override
 	public CacheInvocationParameter getValueParameter() {
-		return valueParameter;
+		return this.valueParameter;
 	}
 
 }

spring-context-support/src/main/java/org/springframework/ui/freemarker/FreeMarkerConfigurationFactory.java

@@ -113,7 +113,7 @@ public class FreeMarkerConfigurationFactory {
 	 * @see #setTemplateLoaderPath
 	 */
 	public void setConfigLocation(Resource resource) {
-		configLocation = resource;
+		this.configLocation = resource;
 	}
 
 	/**