Have you tried using the command line? I got this error, which is not what you got, but is related.
$ nova boot --image cirros-0.3.2-x86_64-uec --flavor m1.tiny --file /tmp/openrc=/home/thang/git/devstack/openrc test1 ERROR (TypeError): __init__() got an unexpected keyword argument 'retry_after'
Have you tried using the command line? I got this error, which is not what you got, but is related.
$ nova boot --image cirros- 0.3.2-x86_ 64-uec --flavor m1.tiny --file /tmp/openrc= /home/thang/ git/devstack/ openrc test1
ERROR (TypeError): __init__() got an unexpected keyword argument 'retry_after'