*: Add cleanpod policy for v1alpha2 (kubeflow#691)

* *: Support cleanpod policy

Signed-off-by: Ce Gao <[email protected]>

* Gopkg: Keep code-generator

Signed-off-by: Ce Gao <[email protected]>

* vendor: Update

Signed-off-by: Ce Gao <[email protected]>

* test: Fix test cases

Signed-off-by: Ce Gao <[email protected]>

* test: Fix

Signed-off-by: Ce Gao <[email protected]>

* test: Fix style

Signed-off-by: Ce Gao <[email protected]>

* defaults: Update

Signed-off-by: Ce Gao <[email protected]>

Don't leave pods running when a job completes. (kubeflow#512)

* Don't leave pods running when a job completes.

* We originally did this to preserve the logs.
* But this ends up leaving pods running consuming resources.
* The fix is straightforward
  * Transition to the cleanup phase before transitioning to the done phase.

Fix kubeflow#128

* Don't teardown the cluster.

* Don't set phase to cleanup when job is running.

* Should only call get status if we are in creating or running phase.

* Update the E2E test

* Check that pod/service event creations are recorded
* Check that pods are deleted when job ends.

* Fix lint.