[QueryTest] Extend phrase query tests

Summary:
Add the filename also with the "F" prefix, like the BasicIndexingJob does.

Do a rename operation on one file to also capture the shadowing of
content by the filename.

Test Plan: ctest -R querytest

Reviewers: Baloo, ngraham

Reviewed By: Baloo, ngraham

Subscribers: kde-frameworks-devel

Tags: Frameworks, Baloo

Differential Revision: https://phabricator.kde.org/D28925