Periodic `error: [Errno 2] No such file or directory` on gsutil cp

## Issue Description

We're attempting to use `gsutil` to download files as part of our DevOps flow. We have gzipped tar archives in a GCS bucket and we're spinning up a docker container in kubernetes to pull down the archives.

Periodically, the `gsutil cp` command will raise an exception:

```
Traceback (most recent call last):
File "/usr/lib/python2.7/multiprocessing/managers.py", line 240, in serve_client
request = recv()
File "/usr/lib/google-cloud-sdk/platform/gsutil/gslib/commands/cp.py", line 27, in
from gslib import copy_helper
File "/usr/lib/google-cloud-sdk/platform/gsutil/gslib/copy_helper.py", line 165, in
else AtomicDict(manager=gslib.util.manager))
File "/usr/lib/google-cloud-sdk/platform/gsutil/gslib/parallelism_framework_util.py", line 52, in __init__
self.lock = manager.Lock()
File "/usr/lib/python2.7/multiprocessing/managers.py", line 667, in temp
token, exp = self._create(typeid, *args, **kwds)
File "/usr/lib/python2.7/multiprocessing/managers.py", line 565, in _create
conn = self._Client(self._address, authkey=self._authkey)
File "/usr/lib/python2.7/multiprocessing/connection.py", line 169, in Client
c = SocketClient(address)
File "/usr/lib/python2.7/multiprocessing/connection.py", line 304, in SocketClient
s.connect(address)
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
error: [Errno 2] No such file or directory
```

We're authenticating with a service account json file:

```sh
gcloud auth activate-service-account --key-file $GOOGLE_APPLICATION_CREDENTIALS
```

and then attempting to download:

```sh
gsutil cp gs://-helm/echoserver/1.8.tgz chart.tgz
```

I can run this repeatedly on the same file in the same bucket. Sometimes it works fine, other times it raises the above exception.

## More Details

Our `Dockerfile` installs the `google-cloud-sdk` like so:

```
FROM debian:jessie

RUN apt-get update -y
RUN apt-get install -y curl git unzip gnupg lsb-release apt-transport-https openssh-client

WORKDIR /tmp/

ENV GOOGLE_SDK_VERSION 187.0.0
RUN export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)" && \
echo "deb https://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" > /etc/apt/sources.list.d/google-cloud-sdk.list && \
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
RUN apt-get update -y
RUN apt-get install -y google-cloud-sdk
RUN gcloud config set core/disable_usage_reporting true
RUN gcloud config set component_manager/disable_update_check true
```

Our entrypoint is a simple shell script that calls `gsutil cp` (as described above):

```
WORKDIR /
ADD run.sh /
RUN ["chmod", "+x", "/run.sh"]
ENTRYPOINT ["/run.sh"]
```

**When this exception occurs, the container does not terminate.**

This is run via a Spinnker pipeline which deploys the container into our Kubernetes cluster with the following manifest:

```yaml
apiVersion: v1
kind: Pod
metadata:
annotations:
kubernetes.io/limit-ranger: 'LimitRanger plugin set: cpu request for container
-manifestgenerator'
creationTimestamp: 2018-02-01T21:43:27Z
name: echoserver-3fc4227dcf281b1c
namespace: default
resourceVersion: "2686221"
selfLink: /api/v1/namespaces/default/pods/echoserver-3fc4227dcf281b1c
uid: f01cabfb-0798-11e8-83c5-42010a800363
spec:
containers:
- args:

# This is the file being pulled from GCS
- gs://-helm/echoserver/1.8.tgz

env:
- name: GOOGLE_APPLICATION_CREDENTIALS
value: /tmp/manifest-generator.json
image: gcr.io//manifest_generator:0.0.1
imagePullPolicy: Always
name: -manifestgenerator
ports:
- containerPort: 80
name: http
protocol: TCP
resources:
requests:
cpu: 100m
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /tmp/
name: "1517433956541"
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-wt4w7
readOnly: true
dnsPolicy: ClusterFirst
imagePullSecrets:
- name: gcr-
nodeName:
restartPolicy: Never
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 30
tolerations:
- effect: NoExecute
key: node.alpha.kubernetes.io/notReady
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.alpha.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes:
- name: "1517433956541"
secret:
defaultMode: 420
secretName: manifest-generator-sa
- name: default-token-wt4w7
secret:
defaultMode: 420
secretName: default-token-wt4w7
status:
conditions:
- lastProbeTime: null
lastTransitionTime: 2018-02-01T21:43:27Z
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: 2018-02-01T21:43:29Z
status: "True"
type: Ready
- lastProbeTime: null
lastTransitionTime: 2018-02-01T21:43:27Z
status: "True"
type: PodScheduled
containerStatuses:
- containerID: docker://868982eaf5bb0d38c008abbbdab3dc494c80165b6453e357dd7a153f89d1a655
image: gcr.io//manifest_generator:0.0.1
imageID: docker-pullable://gcr.io//manifest_generator@sha256:3528171f1b46d85e805abece6ba5cecf19985d281d5a20d19943204417a950b7
lastState: {}
name: -manifestgenerator
ready: true
restartCount: 0
state:
running:
startedAt: 2018-02-01T21:43:28Z
hostIP: 10.128.0.2
phase: Running
podIP: 10.52.12.19
qosClass: Burstable
startTime: 2018-02-01T21:43:27Z
```