lftools nexus release should not try to deploy if their are pom validation failures.

#curl -v -u <lfid:pass> 'https://nexus.opendaylight.org/service/local/staging/repository/honeycomb-vbd-1629/activity'
this returns ....
<stagingActivity>
<name>open</name>
.....
<stagingProperty>
<name>cause</name>
<value>com.sonatype.nexus.staging.StagingRulesFailedException: One or more rules have failed</value>
</stagingProperty>
</properties>
</stagingActivityEvent>
</events>
</stagingActivity>