reverted main in kafka tests

infobip-kafka-testcontainers-spring-boot-starter/src/test/java/com/infobip/testcontainers/spring/kafka/Main.java

@@ -0,0 +1,12 @@
+package com.infobip.testcontainers.spring.kafka;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class Main {
+
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(Main.class).run(args);
+    }
+}