Convert getForFields back to the Query API and add tests
This is possible now that it supports the 'IN' operator.
Added tests to make sure there are no regressions.
Patch by: Sverre Rabbelier
indexes:
# AUTOGENERATED
# This index.yaml is automatically updated whenever the dev_appserver
# detects that a new type of query is run. If you want to manage the
# index.yaml file manually, remove the above marker line (the line
# saying "# AUTOGENERATED"). If you want to manage some indexes
# manually, move them above the marker line. The index.yaml file is
# automatically uploaded to the admin console when you next deploy
# your application using appcfg.py.