pkg/kf/commands/service-bindings: tip user to restart app (#573)
pkg/kf/commands/service-bindings: tip user to restart app (#573)

The user has to restart an app after binding a service to an app. The
bind-service command now displays a tip to the user that they should
restart the app to have the environment variable set.

fixes #569
google/kf,google/kf,google/kf