pom.xml: update findbugs mvn plugin version to latest 2.5.2
pom.xml: update findbugs mvn plugin version to latest 2.5.2

Change-Id: Ice0307ccc05ea78d6eab60408a22d538266cb0bf
Signed-off-by: Eyal Edri <0c20e4549535c289cc2166cc92c7b892ceb19f3b@redhat.com>

OpenUniversity/ovirt-engine,yapengsong/ovirt-engine,eayun/ovirt-engine,yingyun001/ovirt-engine,yingyun001/ovirt-engine,walteryang47/ovirt-engine,halober/ovirt-engine,yapengsong/ovirt-engine,zerodengxinchao/ovirt-engine,yingyun001/ovirt-engine,walteryang47/ovirt-engine,yingyun001/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,halober/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,walteryang47/ovirt-engine,OpenUniversity/ovirt-engine,yapengsong/ovirt-engine,zerodengxinchao/ovirt-engine,zerodengxinchao/ovirt-engine,halober/ovirt-engine,halober/ovirt-engine,eayun/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,OpenUniversity/ovirt-engine,yapengsong/ovirt-engine,zerodengxinchao/ovirt-engine,eayun/ovirt-engine,OpenUniversity/ovirt-engine,walteryang47/ovirt-engine,eayun/ovirt-engine