[KARAF-2286] - Cellar-Cloud: If the configured store contains unknown Blob this causes unpleasant exceptions
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reverted last changes, don't work no meta information is retrieved from blob, 
so improved logging instead ... 

git-svn-id: https://svn.apache.org/repos/asf/karaf/cellar/branches/cellar-2.2.x@1470442 13f79535-47bb-0310-9956-ffa450edef68