Current design of Topic factories in policy-common module is at least bad.

There are tons of copy-pasted code. The code is copy-pasted not only between the factories (for example UepTopicSourceFactory vs DmaapTopicSourceFactory) but also inside methods (build() function in every factory is a great example here).

I would like to rework this whole structure by:

1) Implementing a common Factory class and move all generic code there

2) Rework the way that we handle properties today by removing a common properties interface and creating suitable enums in responsible classes