Fix passing labels to Gerrit when they are not defined in All-Projects
Fix passing labels to Gerrit when they are not defined in All-Projects

Turns out that the shortcut --verified or --code-review only work when
these labels are defined globally for all projects [1]. The other syntax
with a --label works fine even when e.g. the Verified label is being
used just for a subset of projects.

[1] https://gerrit-review.googlesource.com/#/c/51800/1/Documentation/cmd-review.txt

Change-Id: Ib591997141b68708bee0b291bb88a93cd3294301

gooddata/zuul,gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul,wikimedia/integration-zuul