Problems running tests when conflicting Javassist version is on the classpath

Problems deploying addons in 2.0.0.Final :

org.switchyard.tools.forge.BasicFacetTest Time elapsed: -379,976.917 sec <<< ERROR!
org.jboss.arquillian.container.spi.client.container.DeploymentException: AddonDependency org.switchyard.forge:switchyard-addon,2.0.0-SNAPSHOT failed to deploy.
at org.jboss.forge.arquillian.ForgeDeployableContainer.waitForDeploymentCompletion(ForgeDeployableContainer.java:202)
at org.jboss.forge.arquillian.ForgeDeployableContainer.deploy(ForgeDeployableContainer.java:116)
at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$3.call(ContainerDeployController.java:161)
at org.jboss.arquillian.container.impl.client.container.ContainerDeployController$3.call(ContainerDeployController.java:128)
at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.executeOperation(ContainerDeployController.java:271)
at org.jboss.arquillian.container.impl.client.container.ContainerDeployController.deploy(ContainerDeployController.java:127)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

To reproduce :

git clone https://github.com/forge/plugin-switchyard.git
git checkout 2.0
mvn clean install