Merge pull request #198 from oppegard/master

Code quality: [bosh_aws_cpi] Pull registry initialization into its own method
[openstack_cpi] Add snapshot metadata
Merge pull request #199 from cloudfoundry/openstack_snapshots

[openstack_cpi] Add snapshot metadata
[bosh_registry] require 'base64'
[#50205103] add spec:system:vsphere:micro for CI
update cli plugin names in conditional stemcell build logic
Make 'bosh vms' with no argument show all deployments.

Preserve existing behavior of accepting a deployment argument.

Add spec for vms command.
Set target and auth in vms command spec.
Merge pull request #200 from mmb/vms_multiple

Make 'bosh vms' with no argument show all deployments.
[openstack_cpi] Fix snapshot disk when volume doesn't have any attachment
[bosh_aws_cpi] clean up code quality of Bosh::AwsCloud::Cloud#initialize

Add accessors and replace explicit reference to instance variables
Convert unnecessary double-quoted strings to single-quotes
Merge pull request #202 from oppegard/code_quality

[bosh_aws_cpi] clean up code quality of Bosh::AwsCloud::Cloud#initialize
Merge pull request #201 from cloudfoundry/openstack_fix

[openstack_cpi] Fix snapshot disk when volume doesn't have any attachment