Fix warnings about empty xmvn-it JAR
Fix warnings about empty xmvn-it JAR

fedora-java/xmvn,fedora-java/xmvn,mizdebsk/xmvn,mizdebsk/xmvn,fedora-java/xmvn,rvais/xmvn,mizdebsk/xmvn,rvais/xmvn,mizdebsk/xmvn,rvais/xmvn,rvais/xmvn