Use latest snapshots of servlets.get and servlets.resolver

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1580810 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare release org.apache.sling.servlets.get-2.1.8

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1580811 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1580813 13f79535-47bb-0310-9956-ffa450edef68