[maven-release-plugin] prepare release samigo-2.8.6

git-svn-id: https://source.sakaiproject.org/svn/sam/branches/samigo-2.8.x@119119 66ffb92e-73f9-0310-93c1-f5514f145a0a
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://source.sakaiproject.org/svn/sam/branches/samigo-2.8.x@119121 66ffb92e-73f9-0310-93c1-f5514f145a0a