Use KAFKA_ as prefix for environment Kafka config

streams-bootstrap/src/test/java/com/bakdata/kafka/EnvironmentKafkaConfigParserTest.java → streams-bootstrap/src/test/java/com/bakdata/kafka/EnvironmentStreamsConfigParserTest.java

@@ -29,7 +29,7 @@
 import java.util.Map;
 import org.junit.jupiter.api.Test;
 
-class EnvironmentKafkaConfigParserTest {
+class EnvironmentStreamsConfigParserTest {
 
     @Test
     void shouldParseStreamsConfig() {