Added test for POJO in RPC method params. Minor re-factoring.
Conflicts:
	components/camel-avro/src/main/java/org/apache/camel/component/avro/AvroReflectResponder.java
	components/camel-avro/src/main/java/org/apache/camel/component/avro/AvroResponderUtil.java
	components/camel-avro/src/main/java/org/apache/camel/component/avro/AvroSpecificResponder.java
	components/camel-avro/src/test/java/org/apache/camel/component/avro/AvroConsumerTestSupport.java
	components/camel-avro/src/test/java/org/apache/camel/component/avro/AvroHttpConsumerTest.java
	components/camel-avro/src/test/java/org/apache/camel/component/avro/AvroNettyConsumerTest.java
	components/camel-avro/src/test/resources/org/apache/camel/component/avro/avro-netty-consumer.xml