Merge pull request #444 from Sam-Kruglov/patch-1

Log the nested exception as well

json-path/src/main/java/com/jayway/jsonpath/spi/json/JacksonJsonProvider.java

@@ -93,7 +93,7 @@ public class JacksonJsonProvider extends AbstractJsonProvider {
             generator.close();
             return writer.getBuffer().toString();
         } catch (IOException e) {
-            throw new InvalidJsonException();
+            throw new InvalidJsonException(e);
         }
     }