Fix #118 - Maintain schema compatibility for changed probe type

[acmiyaguchi]

Fixes #118. This is done on a case-by-case basis. In particular, this adds a copy of the installation.timestamp metric as a string and a datetime.

export MPS_SSH_KEY_BASE64=$(cat ~/.ssh/id_rsa | base64)

git checkout master
make build && make run

git checkout type_change
make build && make run

This diff shows the change from master: mozilla-services/mozilla-pipeline-schemas@9c966c1

[fbertsch]

@acmiyaguchi the recent run seems to have fixed these. We don't necessarily need to merge this now, okay with you to close?

[acmiyaguchi]

Yep, seems reasonable to me. My only question is, how did it fix itself?

[acmiyaguchi]

Re-opening, because datetimes are the metric that we want to be reporting.

[acmiyaguchi]

Here's a clean diff that works as expected. There isn't an obvious way to check against the repo url in the GleanPing object, so I enumerated the repo names.

mozilla-services/mozilla-pipeline-schemas@8eb8024

[fbertsch]

LGTM