POM changes required to cut an atlassian release of Hazelcast

In Bamboo the error is

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-gpg-plugin:1.4:sign (sign-artifacts) on project hazelcast-root: Cannot obtain passphrase in batch mode -> [Help 1]

Not sure what to supply as a passphrase, so for now I can't find a better solution than just cutting this out.