Set necessary classes as public (#53)

Co-authored-by: Hodur Heidarsson <hheidarsson@ripple.com>

Author: hodur

opentracing-spring-rabbitmq/src/main/java/io/opentracing/contrib/spring/rabbitmq/RabbitMqBeanPostProcessor.java

@@ -30,7 +30,7 @@
  * @author Gilles Robert
  * @author Sud Ramasamy
  */
-class RabbitMqBeanPostProcessor implements BeanPostProcessor {
+public class RabbitMqBeanPostProcessor implements BeanPostProcessor {
 
   private final RabbitMqReceiveTracingInterceptor rabbitMqReceiveTracingInterceptor;
 

opentracing-spring-rabbitmq/src/main/java/io/opentracing/contrib/spring/rabbitmq/RabbitMqReceiveTracingInterceptor.java

@@ -30,7 +30,7 @@
  * @author Gilles Robert
  */
 @AllArgsConstructor
-class RabbitMqReceiveTracingInterceptor implements MethodInterceptor, AfterAdvice, BeforeAdvice {
+public class RabbitMqReceiveTracingInterceptor implements MethodInterceptor, AfterAdvice, BeforeAdvice {
 
   private final Tracer tracer;
   private final RabbitMqSpanDecorator spanDecorator;

opentracing-spring-rabbitmq/src/main/java/io/opentracing/contrib/spring/rabbitmq/RabbitMqSendTracingAspect.java

@@ -29,7 +29,7 @@
  */
 @Aspect
 @AllArgsConstructor
-class RabbitMqSendTracingAspect {
+public class RabbitMqSendTracingAspect {
 
   private final Tracer tracer;
   private final String exchange;