Refactor Merge Silo methods #538
Description
Merge silo and append silo methods currently has more than 300 lines of code. This is to much for two methods. We should separate this methods to smaller functions in order to increase readability and maintainability. Also, we should apply PEP8 to this methods and increase test coverage for them.
Methods to be refactor:
def merge_two_silos(mapping_data, lsid, rsid, msid)
def appendTwoSilos(mapping_data, lsid, rsid, msid):