[maven-release-plugin] prepare branch basiclti-2.1.x

git-svn-id: https://source.sakaiproject.org/svn/basiclti/trunk@121472 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare release basiclti-2.1.x

git-svn-id: https://source.sakaiproject.org/svn/basiclti/trunk@121474 66ffb92e-73f9-0310-93c1-f5514f145a0a