Fixes GB#624346, libtracker-miner: Proper tracker:mountPoint set for volumes
Fixes GB#624346, libtracker-miner: Proper tracker:mountPoint set for volumes

  * Before creating a tracker:Volume, we will first check that the specified
    tracker:mountPoint exists in the store. If it does not exist, we will
    create a dummy nfo:Folder for that mount point. But, in order to get it
    populated with the proper information when crawling it, we need to hack
    the mtime and iri caches, so that if cache is empty after querying the
    store with nfo:belongsToContainer; we do a second query using a FILTER
    with fn:start-with(uri). The dummy nfo:Folder we're inserting won't have
    initially the proper nfo:belongsToContainer property, that's why we need
    this hack.

outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker