[openstack_cpi] Trap overlimit exception when querying resource state
[openstack_cpi] Better error message when there is an API overLimit
[openstack_cpi] Skip process when a volume is not attached to a server
[openstack_cpi] Skip process when volume is already attached to server
[openstack_cpi] Fix has_vm? method
Merge pull request #183 from cloudfoundry/openstack_fixes

Openstack fixes
updated aws cpi readme with elb endpoint
improve code quality of create_disk and availability_zone_selector
public stemcells migrated to S3
Merge pull request #184 from pmenglund/readme

updated aws cpi readme with elb endpoint
Merge pull request #185 from pmenglund/create_disk

improve code quality of create_disk and availability_zone_selector
[fixes #50106711] 'bosh cleanup' works for new-style releases JSON from director
[fixes #49944819] close SSH sessions in bosh_cli_plugin_micro
WIP DAV blobstore.
Added dav blobstore client.
Fixed ngnix config to eliminate symlink.
Default director blobstore provider to dav.
Use blobstore for directory names.
Fix blobstore log path.
Finished up blobstore dav switch
use https for stemcell index on S3