Replace Invalid JSON msg with exception msg

Author: jlisam

plugin/src/main/shell/protoc-gen-flit

@@ -15,7 +15,7 @@
 # The quiet flag is required otherwise the tooling will dump output to stdout which will break the
 # plugin output and generation will fail.
 # -----------------------------------------------------------------------------
-DIR=$(dirname "$0")
+DIR=$(dirname $(readlink -f "$0"))
 
 JAR=$(ls -c ${DIR}/plugin-*-all.jar | head -1)
 java ${FLIT_JAVA_OPTS} -jar $JAR $@

runtime/spring/src/main/java/com/flit/runtime/spring/FlitExceptionHandler.java

@@ -3,9 +3,6 @@
 import com.flit.runtime.ErrorCode;
 import com.flit.runtime.FlitException;
 import com.google.protobuf.InvalidProtocolBufferException;
-import java.util.HashMap;
-import java.util.Map;
-import javax.servlet.http.HttpServletRequest;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.http.MediaType;
@@ -15,11 +12,15 @@
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
 
+import javax.servlet.http.HttpServletRequest;
+import java.util.HashMap;
+import java.util.Map;
+
 @ControllerAdvice
 @Component
 public class FlitExceptionHandler extends ResponseEntityExceptionHandler {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(FlitExceptionHandler.class);
+    private static final Logger LOGGER = LoggerFactory.getLogger(FlitExceptionHandler.class);
 
 
     @ExceptionHandler(Exception.class)