adding "openejb-jpa-integration" into the classpath of "execute-jaxrs-installer" and "execute-plus-installer" gmaven-plugin executions otherwise "~/dev/ws/tomee/trunk/tomee$ mvn clean install" won't work.

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1546368 13f79535-47bb-0310-9956-ffa450edef68