How to clear the dateformat got set from my machine database connection from my machine dateformat setting for oracle

How to clear the dateformat got set from my machine oracle database connection from my machine

As in this post i have changed my sql deveoper calling a SP and it is working fine but the same is not working from tomcat server

but it is working from other machine, same code i moved to other machine and it is working like a charm

Is there a way to configure/Clear any settings for this ?