Workaround for LPS-43917

Hello Igor,
I recently filed an issue associated with Web Service API - https://issues.liferay.com/browse/LPS-43917. I created a solution/workaround for this problem for 6.1.1 and created pull request to main *liferay-portal* repo. I was then told that I should test it on master branch and send this pull request to your repo as you are responsible for this area.

Unfortunately, after compiling and running fresh Liferay from master, I couldn't even run the service from JavaScript - in 6.1.1 i included */html/js/liferay/service.js* in order to use services , in 6.2 I couldn't find it or it's equivalent.

Anyway, the problem still exists in 6.2, as *java.lang.Calendar* type is still not supported by *getArgValue* of *JSONServiceAction* class.

All other details and bug description are in https://issues.liferay.com/browse/LPS-43917 and its comments. I hope I could help you with my solution.