Updated POM to change artifact version to 3.1.0-SNAPSHOT

GCP-10251

Reviewer : Cyrus Venn Casada
Use an incremental index for columnIndex for creating an excel cell

BMS-72

Reviewer: Daniel Jao
In populating the values per row in an excel, make the filling of the columnValue based on the columnHeader

BMS-72

Reviewer: Daniel Jao
Update POM to be consistent on use of . versus - in version naming

Reviewer : Cyrus Venn Casada
Change the access modifiers of some methods and fields to make it suitable for inheritance and testing

BMS-76

Reviewer: Mae Turiana
Modified pom.xml to support update of Spring version:
 - updated spring.version property
 - removed separate spring-asm and cglib dependencies (already embedded in 3.2.x)

GCP-10175

 Reviewer : Aldrin Batac
Sync: Merged branch 'master' into 'BMS-33-authentication-authorisation'