feat/perf-test: continue test when fail to get commit id (#1930)
feat/perf-test: continue test when fail to get commit id (#1930)

* feat/perf-test: continue test when fail to get commit id

changeset.Get does not work well when the test image is in the
vendor directory because there is no kodata setup. After this
commit, failure to get the commit id will result in a
log entry instead of failing the whole test.

* Update test/mako/sidecar.go

Co-authored-by: Pierangelo Di Pilato <b6054fff5975a97a6b1347c22e6e7915c701af4c@gmail.com>

Co-authored-by: Pierangelo Di Pilato <b6054fff5975a97a6b1347c22e6e7915c701af4c@gmail.com>
knative/pkg,knative/pkg