OAK-1837 - improve error handling for closed RDBBlobStore


git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1595846 13f79535-47bb-0310-9956-ffa450edef68
OAK-301: Document Oak
- Minor update

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OAK-301 : oak docu

Details related to mongo uri config

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1595855 13f79535-47bb-0310-9956-ffa450edef68
OAK-1745: OrderedIndex should serve range queries regardless of direction
Patch from Davide

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