vSphere CPI downloads blobs properly
vSphere CPI downloads blobs properly

fixes:
```
bosh create-release  --tarball
Blob download 'vsphere_cpi_mkisofs/cdrtools-3.00.tar.bz2' (2.0 MB) (id: 93d9103d-44cf-47da-9343-49c1a4bea480 sha1: 6464844d6b936d4f43ee98a04d637cd91131de4e) started

Blob download 'vsphere_cpi_mkisofs/cdrtools-3.00.tar.bz2' (id: 93d9103d-44cf-47da-9343-49c1a4bea480) failed

Getting blob '93d9103d-44cf-47da-9343-49c1a4bea480' for path 'vsphere_cpi_mkisofs/cdrtools-3.00.tar.bz2':
  Getting blob from inner blobstore:
    Getting blob from inner blobstore:
      BucketRegionError: incorrect region, the bucket is not in 'us-east-1' region
       	status code: 301, request id:

Exit code 1
```

Signed-off-by: Lyle Franklin <31e283733c7a4b3b6cb03b95ab535671c2112bbe@pivotal.io>

cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release