how is your deployment method? have you tried with mixed mode (testable=true & @RunAsClient)? as for now persistence and drone extensions have limited integration, see this thread: https://developer.jboss.org/thread/204192
and this issue: https://issues.jboss.org/browse/ARQ-1077
For using both extensions I have a workaround decribed here: https://rpestano.wordpress.com/2014/11/08/arquillian-cucumber-dbunit/, it basically exposes dbunit functionality as Rest endpoints which i call in test setup.
I hope it helps.