This fixes the following warning:
[WARNING] Some problems were encountered while building the effective model for org.opendaylight.controller.samples:sample-toaster-it:jar:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.ops4j.pax.exam:maven-paxexam-plugin is missing. @ line 23, column 12
Change-Id: I2c46e72940e9ee016a3e6ebb36a39fb7442d90e7
Signed-off-by: Chris Wright <chrisw@sous-sol.org>