[FIX] business_requirement: Change some model functions name to follow guideline and remove not necessary isolated functions. 	modified:   business_requirement/models/business.py
[FIX] business_requirement: Change some model functions name to follow guideline
and remove not necessary isolated functions.
	modified:   business_requirement/models/business.py

YogeshMahera-SerpentCS/business-requirement,sudhir-serpentcs/business-requirement