Retry a few more times when a report which was just uploaded is not available yet

[marco-c]

There are some tasks which fail because they can't find the report they just uploaded:

Traceback (most recent call last):
  File "/usr/local/bin/code-coverage-bot", line 11, in <module>
    load_entry_point('code-coverage-bot==1.0.0', 'console_scripts', 'code-coverage-bot')()
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/cli.py", line 71, in main
    c.go()
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/codecov.py", line 230, in go
    self.go_from_trigger_mozilla_central()
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/codecov.py", line 167, in go_from_trigger_mozilla_central
    uploader.gcp(self.branch, self.revision, report)
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/uploader.py", line 45, in gcp
    retry(lambda: gcp_ingest(repository, revision), retries=5)
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/utils.py", line 27, in retry
    return operation()
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/uploader.py", line 45, in <lambda>
    retry(lambda: gcp_ingest(repository, revision), retries=5)
  File "/usr/local/lib/python3.7/site-packages/code_coverage_bot-1.0.0-py3.7.egg/code_coverage_bot/uploader.py", line 73, in gcp_ingest
    resp.raise_for_status()
  File "/usr/local/lib/python3.7/site-packages/requests-2.22.0-py3.7.egg/requests/models.py", line 940, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: NOT FOUND for url: https://api.coverage.moz.tools/v2/path?repository=mozilla-central&changeset=5585edba8fdb83267722e62241952272c8e24a8f

If you retrigger them, they pass as the report is already available on GCP:

�[37m2019-07-24 22:43:05.489552 [INFO    ] code_coverage_bot.codecov: Mercurial revision (revision='5585edba8fdb83267722e62241952272c8e24a8f')�[39;49;00m
�[33;01m2019-07-24 22:43:07.322499 [WARNING ] code_coverage_bot.codecov: Covdir report already on GCP�[39;49;00m

This means that if we waited a bit more, the task wouldn't fail.