Properly handle dry-run in flagutil clients
Properly handle dry-run in flagutil clients

Three of the methods were checking `o.dryRun` before it was actually set
by `o.resolve()`. Because the `o.resolve()` does not do anything except
setting `o.dryRun` when `dryRun` is true, the methods ended up returning
nils without any errors, which is very likely not what the callers of
these methods expect.

cjwagner/test-infra,dims/test-infra,cjwagner/test-infra,pwittrock/test-infra,lavalamp/test-infra,kubernetes/test-infra,brahmaroutu/test-infra,krzyzacy/test-infra,fejta/test-infra,brahmaroutu/test-infra,lavalamp/test-infra,lavalamp/test-infra,kubernetes/test-infra,dims/test-infra,cjwagner/test-infra,ixdy/kubernetes-test-infra,michelle192837/test-infra,krzyzacy/test-infra,kubernetes/test-infra,cblecker/test-infra,lavalamp/test-infra,jessfraz/test-infra,ixdy/kubernetes-test-infra,dims/test-infra,ixdy/kubernetes-test-infra,monopole/test-infra,michelle192837/test-infra,BenTheElder/test-infra,cjwagner/test-infra,jessfraz/test-infra,ixdy/kubernetes-test-infra,michelle192837/test-infra,fejta/test-infra,cblecker/test-infra,cblecker/test-infra,michelle192837/test-infra,BenTheElder/test-infra,lavalamp/test-infra,BenTheElder/test-infra,pwittrock/test-infra,monopole/test-infra,dims/test-infra,cjwagner/test-infra,pwittrock/test-infra,monopole/test-infra,kubernetes/test-infra,kubernetes/test-infra,cblecker/test-infra,krzyzacy/test-infra,krzyzacy/test-infra,fejta/test-infra,jessfraz/test-infra,fejta/test-infra,kubernetes/test-infra,brahmaroutu/test-infra,BenTheElder/test-infra,fejta/test-infra,jessfraz/test-infra,monopole/test-infra,brahmaroutu/test-infra,monopole/test-infra,jessfraz/test-infra,dims/test-infra,krzyzacy/test-infra,cblecker/test-infra,pwittrock/test-infra,ixdy/kubernetes-test-infra,brahmaroutu/test-infra,brahmaroutu/test-infra,krzyzacy/test-infra,lavalamp/test-infra,cblecker/test-infra,michelle192837/test-infra,dims/test-infra,monopole/test-infra,jessfraz/test-infra,fejta/test-infra,cjwagner/test-infra,BenTheElder/test-infra,pwittrock/test-infra,michelle192837/test-infra,BenTheElder/test-infra