Fixed maven-paxexam-plugin version.

Latest version of maven-paxexam-plugin is 1.2.4 and not 3.0.0,
this incorrect declaration broke build in controller project.

Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Change-Id: Id430fab8dde594e418cbebe496edd1f15f4258dc
Merge "Fixed maven-paxexam-plugin version."