When I use mvn tomcat:deploy of tomcat-maven-plugin there is a 403 error:
Failed to execute goal org.codehaus.mojo:tomcat-maven-plugin:1.0:deploy (default-cli) on pr
I used to get the same error, you just have to make sure that tomcat-users.xml file contain the user (admin in my case) with roles as (manager, manager-gui, admin, manager-script).
I have tomcat 7, maven 3 on ubuntu.