Audit: NFTFactoryContract Missing Error messages

[vishaldantuluri]

There are no error messages in the “require” statements that may lead to confusion on the client side.

[kishan79]

@vishaldantuluri Initially error messages were added, then later were removed to reduce the contract size.

[vishaldantuluri]

@kishan79 yes that is correct

[techpandora]

We need to include the short error msg.. Good practice to do