Add support for custom TypeMapping

[smitpatel]

At present we are making changes to our property discovery so that all the types supported by the provider can be mapped as primitive properties. In the addition to provider supported types, user may want to use some other type as a primitive by providing a custom typemapping through which it can be mapped to one of the known types of the provider and subsequently be used as a primitive property.
Also see #2588

[divega]

@smitpatel this might be a dupe of #242. Although I like the title and the details you put into this bug, we have referred to the other bug a few times. I don't care too much about which one wins 😄

[smitpatel]

I have updated the other issue and closing this.