fix the validation rule

Author: wyTrivail

validator/src/main/java/com/amazon/aoc/callers/HttpCaller.java

@@ -6,7 +6,6 @@
 import com.amazon.aoc.helpers.RetryHelper;
 import com.amazon.aoc.models.SampleAppResponse;
 import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.log4j.Log4j2;
 import okhttp3.OkHttpClient;
@@ -39,14 +38,16 @@ public SampleAppResponse callSampleApp() throws Exception {
               throw new BaseException(ExceptionCode.DATA_EMITTER_UNAVAILABLE);
             }
             SampleAppResponse sampleAppResponse = null;
-            try{
-              sampleAppResponse = new ObjectMapper().readValue(responseBody, SampleAppResponse.class);
-            }catch (JsonProcessingException ex){
+            try {
+              sampleAppResponse =
+                  new ObjectMapper().readValue(responseBody, SampleAppResponse.class);
+            } catch (JsonProcessingException ex) {
               // try to get the trace id from header
               // this is a specific logic for xray sdk, which injects trace id in header
               log.info("getting trace id from header");
               //  X-Amzn-Trace-Id: Root=1-5f84a611-f2f5df6827016222af9d8b60
-              String traceId = response.header(GenericConstants.HTTP_HEADER_TRACE_ID.getVal()).substring(5);
+              String traceId =
+                  response.header(GenericConstants.HTTP_HEADER_TRACE_ID.getVal()).substring(5);
               sampleAppResponse = new SampleAppResponse();
               sampleAppResponse.setTraceId(traceId);
             }