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Override recycler pod in GCE

**What this PR does / why we need it**:
Override the default nfs and hostpath recycler pod with the busybox image from gcr.io/google-containers.  It does this by:
* writing out the new recycler pod spec to /home/kubernetes
* specifying recycler pod arguments to kube-controller-manager, 
* adding a hostpath volume to the recycler pod spec in the kube-controller-manager manfiest

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```