`odo dev` New way of storing `namespace`/`projects` information

[kadel]

/kind user-story

User Story

As an odo user, I expect that odo dev will deploy my application to the current namespace.

current situation: odo dev deploys the application to the current namespace only the first time. Then the namespace is saved into the env.yaml and the next time you run odo dev, even if the namespace was changed, the resources are created in the original namespace.

Acceptance Criteria

• [ ] every time odo dev is started, it should always use the current namespace/project as set in kubeconfig
• [ ] odo dev should remove "project" information from the env.yaml when it ends (as part of the cleanup procedure)

/kind user-story