SLING-4013 allow optional properties/child resources within validation model

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642306 13f79535-47bb-0310-9956-ffa450edef68
SLING-4210 - move to package-info files

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642313 13f79535-47bb-0310-9956-ffa450edef68
SLING-4210 - SerializedRenderer implements RendererFactory

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642314 13f79535-47bb-0310-9956-ffa450edef68
SLING-4211 - testing/pom.xml added

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642316 13f79535-47bb-0310-9956-ffa450edef68
SLING-3821 add more test support bundles, exclude/include some tests

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642806 13f79535-47bb-0310-9956-ffa450edef68
SLING-3017 fix excludes (r1640720)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642812 13f79535-47bb-0310-9956-ffa450edef68
SLING-3027 SLING-3017 add new Sling Extension Resource Merger feature

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1642815 13f79535-47bb-0310-9956-ffa450edef68