Add Gerrit ACLs for clouddocs maven plugin project

* .../files/gerrit/acls/stackforge/clouddocs-maven-plugin.config:
The ACL file for the clouddocs maven plugin project was missed during
the initial change to import this project. Add the ACL file to fix group
creation for clouddocs-maven-plugin.

Change-Id: Ia6c19cd39a6c1179defdcbeea91e484b60f6e030
Merge "Add Gerrit ACLs for clouddocs maven plugin project"