SAK-23179 update purepoms parent to 2.8.7

git-svn-id: https://source.sakaiproject.org/svn/polls/branches/polls-1.4.x@119043 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare release polls-1.4.5

git-svn-id: https://source.sakaiproject.org/svn/polls/branches/polls-1.4.x@119044 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://source.sakaiproject.org/svn/polls/branches/polls-1.4.x@119046 66ffb92e-73f9-0310-93c1-f5514f145a0a