tracker-tag: Replace --or-operator with --and-operator for --list option

Currently all arguments supplied for --list are handled with an OR condition,
making the existing --or-operator redundant.

This makes --and-operator useful for querying for files matching 1 or more tag
labels.

https://bugzilla.gnome.org/show_bug.cgi?id=725717
Merge branch 'tracker-tag-and-operator-fix'