OAK-1707 : RestrictionProviderImpl returns empty pattern if all supported restrictions are set
OAK-1706 : Add RestrictionProvider#getPattern(String,Set<Restriction>)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1585963 13f79535-47bb-0310-9956-ffa450edef68