`deleteProject()` test for `odo.ts` is not properly torn down

[datho7561]

In the case that the test namespace my-test-project-3 already exists, the test will fail. The code does not attempt to remove this namespace in the setup or the teardown code. This also means that if deleting the project failed at some point, the namespace will remain on the cluster, and all future runs of this test case will fail.