RFE: Allow exclusion of user-defined scopes

Related to MDEP-146 [1], this is a RFE (request for enhancement) to add a parameter to dependency:analyze to accept a list of scopes to ignore. This feature would be used to support use cases where you wish to analyze a project's compile and test dependencies to ensure only the minimum necessary dependencies are declared but ignore runtime and provided dependencies. The current ignoreNonCompile parameter prevents test dependencies from being analyzed which can cause a developer to miss test dependencies that should/not be declared. By making this parameter accept a list of scopes, this feature would have the flexibility to support other use cases as well.

[1] http://jira.codehaus.org/browse/MDEP-146