I have the following project structure:

project 1
module 1
module 2
module 3

project 2
module 1
module 2

Project 2, module 2 depends on all modules in project 1 and module 1 of project
2. Both project 1 and project 2 are built as m2 projects as a single build (not
built in parallel). Therefore, after project 1 finishes building, I expect it
to trigger project 2 because project 2 is dependent on project 1 and is a
downstream build. IMHO, this would be true continuous integration. However,
the only way I can get it to trigger the downstream build is to configure a
post-build action.