Distribute Bluemix stemcells to more DCs duing building process

[mattcui]

DCs include dal05, dal06, dal09, dal10, fra02, fra04, fra05, lon02, lon04, lon06, syd01, syd04, wdc04, wdc06, wdc07

Only necessary for Bluemix stemcell, not community ones.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/161371507

The labels on this github issue will be updated when the story is started.

[mattcui]

dup due to a GitHub outage issue.