This CR refactors the code for statecouchdb implementation.
This includes splitting the code into different files and
making the code more modular by spliting it into high level structures and functions
so to make the code more readble and maintainable

The unit tests are not changed in this CR so as to make sure
that things are not lost in the refactoring

Change-Id: I5c937f7d3c541be0b89591175b6946ae32c5833f
Signed-off-by: manish <manish.sethi@gmail.com>