ARTEMIS-3328: only build the source-release assembly during the release process, or upon request
ARTEMIS-3328: only build the source-release assembly during the release process, or upon request

jbertram/activemq-artemis,clebertsuconic/activemq-artemis,TomRoss/activemq-artemis,clebertsuconic/activemq-artemis,tabish121/activemq-artemis,graben/activemq-artemis,apache/activemq-artemis,apache/activemq-artemis,TomRoss/activemq-artemis,tabish121/activemq-artemis,TomRoss/activemq-artemis,jbertram/activemq-artemis,jbertram/activemq-artemis,graben/activemq-artemis,TomRoss/activemq-artemis,graben/activemq-artemis,clebertsuconic/activemq-artemis,jbertram/activemq-artemis,tabish121/activemq-artemis,tabish121/activemq-artemis,apache/activemq-artemis,apache/activemq-artemis,graben/activemq-artemis,clebertsuconic/activemq-artemis