New rule to prevent circular dependencies in a maven project (not just a module)

[harrisric]

It is possible to have each module have a set of depencies which are not circular in themselves but which makes it impossible to build either project, i.e.
Suppose you have two 'projects' (A, B) each of which has two modules (1, 2).
A2 depends on A1, B1
B2 depends on A1, B1
Therefore I cannot build A1 and A2 without B1, but I cannot build B1, B2 without A1.
I propose a new rule BanProjectCircularDependencies which prevents this.