Bug 784133

Description of problem:
This was reported by an end user (very specific use case - might sound like a subcase of bug# 783524:
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I've tried to create a domain a few times, but at this point I get the following:


    [israel@nexus] $ rhc-create-domain -n exsolent -l bruce.israel
    Password: 
    OpenShift Express key found at /home/israel/.ssh/libra_id_rsa.  Reusing...
    Problem reported from server. Response code was 400.
    Re-run with -d for more information.

    RESULT:
    A user with RHLogin 'bruce.israel' already exists


which is a very bad error for a domain creation command.  So I registered a second email, and now I get this:

    [israel@nexus] $ rhc-create-domain -n exsolent -l bnisrael
    Password: 
    OpenShift Express key found at /home/israel/.ssh/libra_id_rsa.  Reusing...
    Problem reported from server. Response code was 500.
    Re-run with -d for more information.

    RESULT:
    Error communicating with DNS system.  If the problem persists please contact Red Hat support.


which I have been getting most of the weekend, on the other account as well.
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Summary:  The user tried creating a domain with the same name using 2 different Logins.  We should have thrown the correct error message.

Version:  In production now (I believe 0.84.15)