False negatives in extension-developer-e2e job

[m1kola]

As reported in #481 (comment) it seems like extension-developer-e2e job occassionally reports green when it should be be reporting red.

This allowed #444 to be merged without updating test data.

[joelanford]

Do we need to check metadata.generation == status.observedGeneration as a precondition for the other checks.

[m1kola]

This job is now called extension-developer-e2e