I have solved removing the duplicate.
I hope I didn't make error. Now all seems work well. I suggest to check the pom.
I found duplicate, i remove all the duplicated without exclusion: junit, org.exoplatform.core:exo.core.component.organization.api
But this declaration: org.exoplatform.kernel:exo.kernel.commons one has not exclusion while another one has. So i remove the one without exclusion. I don't know if it's the most conservative approach: I'm a newbie of maven...only a simple user.
Should I post to Jira something?