SAK-23179 update purepoms parent to 2.8.7

git-svn-id: https://source.sakaiproject.org/svn/jsf/branches/jsf-2.8.x@118982 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare release jsf-2.8.5

git-svn-id: https://source.sakaiproject.org/svn/jsf/branches/jsf-2.8.x@118987 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://source.sakaiproject.org/svn/jsf/branches/jsf-2.8.x@118990 66ffb92e-73f9-0310-93c1-f5514f145a0a