tracker-miner-fs: Reset retry counter when we need to prepend parents
tracker-miner-fs: Reset retry counter when we need to prepend parents

The situation where a parent directory has to be prepended in order to
process the current file is rare, mainly reserved to IndexFile calls
on files out of watched dirs.

This is a corner situation, but it is a legit place where we have to
put the file back again in the queue, and thus we shouldn't increase
the retry counter.

This nominally fixes the indexing of gnome-documents-getting-started.pdf
on a fresh-out tracker DB, as requested by gnome-shell.

https://bugzilla.gnome.org/show_bug.cgi?id=751992

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