FORGE-1665: Created forge-bom
FORGE-1665: Added furnace-maven-plugin version back to pluginManagement
FORGE-1665: Fixed BOM issues
Prevent NPE when no Addon is selected.
Rename command for consistency with other 'New' commands
Add return type to new test command output
Test actually verifies build success
Added tests for creating OneToMany relationship.
Removed redundant controller and fail check from the test
Added unit tests for the FieldOperations class.

Fixed a couple of issues -
* OneToOne relationships were not being saved.
* Imports were not added for the related type in OneToOne relations

Also removed unwanted method parameters for creating OneToOne and
ManyToOne relationships. These types do not have the concept of
optional=false aka required relationships.
Fixed license header for FieldOperationsTest
Updated to use Furnace 2.1.2-SNAPSHOT