REVIEW: [NX-420] File Blob Store builder

JIRA: https://issues.sonatype.org/browse/NX-420

Feature Build:
http://bamboo.s/browse/NX-OSSF59-3 :thumbsup: 
The only trick right now is that I want the kazuki store that holds blob metadata to be right next to blob content, so that they can be backed up together in a fairly straight forward manner - which the kz db in a different place than Neuxs' other kazuki stores.  There's a tech debt item to look at this.