…mail_scope_to_gcp_credentials_refresh_submodule

Updating Submodule for GCP Email Scope Addition

All our libraries that depended on `kubernetes` started breaking today.
The reason is that pip does not do a good job properly resolving the compatible package versions.
It just install packages in order without caring about the incompatibilities.
The urllib3 package installed is incompatible with the `requests` package that's getting installed later.

Changing the order fixes the issue.

Correct inconsistent spacing and typos

Fix broken dependencies.

…yaml-namespaced

Add method to dynamically set namespace in yaml files

Sometimes, minikube lags behind kubernetes which can lead
to a breakage of the test suite, since minikube will fail to start
with the latest kubernetes version.
See for example [this issue](kubernetes/minikube#4371).

This change defaults to leave the decision of which k8s version to use,
to minikube itself. This is defined in:

https://github.com/kubernetes/minikube/master/pkg/minikube/constants/constants.go

However, if one really desires it is still possible to pass

`--kubernetes-version=X.Y.Z`

to minikube initialization start command via an environment variable
before invoking the test suite:

export $MINIKUBE_ARGS="--kubernetes-version=X.Y.Z"

This allows ofcourse passing other flags to minikube also.

…-k8s-version

Don't use latest stable version for minikube

Prepare master branch for 10.0.0 release

…ease-10.0