fix checkstyle issues

Signed-off-by: Shenoy Pratik <sgguruda@amazon.com>

Author: ps48

data-prepper-plugins/otlp-source/src/test/java/org/opensearch/dataprepper/plugins/source/otlp/OTLPSourceConfigTests.java

@@ -22,7 +22,11 @@
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class OTLPSourceConfigTests {
   private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper().registerModule(new JavaTimeModule());