[Buildbot] #2956: Provide latent Docker build slave

[Buildbot trac]

#2956: Provide latent Docker build slave
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Reporter:  sa2ajj                 |       Owner:  Ben
    Type:  enhancement            |      Status:  assigned
Priority:  patches-accepted       |   Milestone:  0.9.+
 Version:  master                 |  Resolution:
Keywords:  docker, slave, latent  |
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Comment (by sa2ajj):

 As agreed, environment variables is going to be in a separate PR.

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Ticket URL: <http://trac.buildbot.net/ticket/2956#comment:13>
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