SLING-3687 - "The selected project is not configured with/added to any
Sling server" during Sling Import or Export

Support multiple facets by evaluating all possible modules

Contributed by: Konrad Windszus <konrad.windszus@netcentric.biz>

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1604819 13f79535-47bb-0310-9956-ffa450edef68