My scenario is the following:
I have a WebApp.war that is deployed to a servlet container. This WebApp.war contains in WEB-INF/lib the following libraries:
Since you are using Tomcat, you could leverage the VirtualWebappLoader.
Add a META-INF/context.xml whith
META-INF/context.xml
Remember also that the virtualClasspath attribute must be a absolute path, as correctly stated in the comment below.