Update appengine imports for external_testcase_reader.

[pgrace-google]

(drive by add additional component filter in query for extra safety)

[pgrace-google]

(context failure logs: http://shortn/_BBefaIUwXU)

[pgrace-google]

updated!

i do not actually know if the problem of the imports is to be fixed by adding that to the path - but does that seem like a sensible solution to you??

[alhijazi]

updated!

i do not actually know if the problem of the imports is to be fixed by adding that to the path - but does that seem like a sensible solution to you??

So the issue is coming from these two imports:

from appengine.libs import form
from appengine.libs import gcs

Looking at the other cron jobs in the same directory, I noticed non of them use appengine imports.

Also, I noticed that for cron jobs like cleanup (

clusterfuzz/src/clusterfuzz/_internal/cron/cleanup.py

Line 4 in 8e43b8b

# you may not use this file except in compliance with the License.

), there's an appengine cron handler called cleanup located here:

clusterfuzz/src/appengine/handlers/cron/cleanup.py

Line 4 in 8e43b8b

# you may not use this file except in compliance with the License.

Same pattern exists for predator_pull and triage in https://github.com/google/clusterfuzz/tree/8e43b8b4bc7b984defe62654a2ec05365a7fdb7f/src/appengine/handlers/cron.

The right approach might be similar to what was done for these three cron jobs.

Adding @jonathanmetzman as the code owner.