Fix SMTP auth when sending announcement emails

Author: dadoonet

release.sh

@@ -212,7 +212,7 @@ then
             git checkout -q beyonder-${RELEASE_VERSION}
             SMTP_USERNAME=$(readvalue "Enter your SMTP username" "[email protected]")
             SMTP_PASSWORD=$(readvalue "Enter your SMTP password" "")
-            mvn changes:announcement-mail -Dchanges.username='${SMTP_USERNAME}' -Dchanges.password='${SMTP_PASSWORD}' >> /tmp/beyonder-${RELEASE_VERSION}.log
+            mvn changes:announcement-mail -Dchanges.username=${SMTP_USERNAME} -Dchanges.password=${SMTP_PASSWORD} >> /tmp/beyonder-${RELEASE_VERSION}.log
             git checkout -q ${CURRENT_BRANCH}
         else
             echo "Message not sent. You can send it manually using:"