[Buildbot] #3279: get rid of getent in ansible playbooks

[Buildbot trac]

#3279: get rid of getent in ansible playbooks
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Reporter:  sa2ajj   |       Owner:
    Type:  task     |      Status:  new
Priority:  major    |   Milestone:  sys - on-bb-infra
 Version:           |  Resolution:
Keywords:  ansible  |
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Comment (by skelly):

 `~user` appears to work in some cases. The `expanduser` filter will expand
 it always. Simple testing has something working so going to try replacing
 each getent use and test to make sure it keeps working.

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Ticket URL: <http://trac.buildbot.net/ticket/3279#comment:1>
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