[testFaceRestHost] Remove the DB setting in the helper function.

Calling a DB setup function in the middle much degrades readability
and may cause unexpected behaivor.
[fixtures] Remove the tool for making a test DB that is no longer used.

By the previos effort, we no longer use testDatabase-hatohol.db,
which depends on SQLite3. So the tools for it can be removed.
Merge pull request #465 from project-hatohol/cleanup-start-face-reset

Cleanup start face reset