Skaffold unable to update labels when deploying to namespace other than default

[ianlewis]

Expected behavior

skaffold can deploy objects to a namespace other than default

Actual behavior

When using 'skaffold dev' or 'skaffold run', after deploy a warning message is shown for each object

WARN[0035] error adding label to runtime object: patching resource /foo-config: configmaps "foo-config" not found 
WARN[0036] error adding label to runtime object: patching resource /bar-api: deployments.apps "bar-api" not found

Information

• Skaffold version: v0.15.1
• Operating system: linux

Steps to reproduce the behavior

1. Create manifest files that deploy to another namespace other than default
2. Run 'skaffold dev' or 'skaffold run' to deploy