Add scope to the index objects in classifier test.
Add scope to the index objects in classifier test.

This fixes weird bugs on NFS filesystems (EWS as my test case) where the
files can't be deleted if they are still open.

husseinhazimeh/meta,husseinhazimeh/meta,husseinhazimeh/meta,gef756/meta,husseinhazimeh/meta,husseinhazimeh/meta,saq7/MeTA,saq7/MeTA,gef756/meta,esparza83/meta,gef756/meta,esparza83/meta,gef756/meta,esparza83/meta,gef756/meta,esparza83/meta,saq7/MeTA,esparza83/meta