Put SAC-related tests in their own classes

References #46, rabbitmq/rabbitmq-server#3753

Author: acogoluegnes

src/test/java/com/rabbitmq/stream/impl/SingleActiveConsumerTest.java renamed to src/test/java/com/rabbitmq/stream/impl/SacClientTest.java

@@ -45,7 +45,7 @@
 
 @ExtendWith(TestUtils.StreamTestInfrastructureExtension.class)
 @TestUtils.SingleActiveConsumer
-public class SingleActiveConsumerTest {
+public class SacClientTest {
 
   String stream;
   TestUtils.ClientFactory cf;

src/test/java/com/rabbitmq/stream/impl/StreamConsumerSacTest.java renamed to src/test/java/com/rabbitmq/stream/impl/SacStreamConsumerTest.java

@@ -34,7 +34,7 @@
 
 @ExtendWith(TestUtils.StreamTestInfrastructureExtension.class)
 @TestUtils.SingleActiveConsumer
-public class StreamConsumerSacTest {
+public class SacStreamConsumerTest {
 
   String stream;
   EventLoopGroup eventLoopGroup;