Return empty hashmap when parameters to be returned are default parameters.

[dushyantk1509]

This is the change as suggested by @mkumar1984 in PR#620 which was merged earlier. More information about the change, please follow thic doc : https://docs.google.com/document/d/1ft1ccj1aKrCB0RttGSzStVCwckgyYVMR4XWy_tNmeTE/edit?usp=sharing