cannot handle "=" in parameters

[Steven Hardy]

Fail with "too many values to unpack" error in the following situation, which works fine via heat-cfn

# heat create os5 --template-file=/home/shardy/git/heat-templates/openshift-origin/OpenShift.template --parameters="KeyName=${USER}_key;DnsSecKey=hsgx1m31PbamNF4WEcHlwjIlCGgifOdoB58/wwC7a4oAONQ/fDV5ctqrYBoLlKHhTfkyQEw9iVScKYZbbMtMNg==;UpstreamDNS=8.8.8.8"
too many values to unpack

# heat-cfn create os5 --template-file=/home/shardy/git/heat-templates/openshift-origin/OpenShift.template --parameters="KeyName=${USER}_key;DnsSecKey=hsgx1m31PbamNF4WEcHlwjIlCGgifOdoB58/wwC7a4oAONQ/fDV5ctqrYBoLlKHhTfkyQEw9iVScKYZbbMtMNg==;UpstreamDNS=8.8.8.8"
<CreateStackResponse>
  <CreateStackResult>
    <StackId>arn:openstack:heat::1938f0707fe04b58b0053040d4a0fe06:stacks/os5/b9df3a3c-042d-4afb-92c7-7a57b84b382a</StackId>
  </CreateStackResult>
</CreateStackResponse>

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/30966

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/30966
Committed: http://github.com/openstack/python-heatclient/commit/9b1ce2108189cdfd499e116500fad566670260bc
Submitter: Jenkins
Branch: master

commit 9b1ce2108189cdfd499e116500fad566670260bc
Author: Sulochan Acharya <email address hidden>
Date: Wed May 29 18:04:46 2013 -0500

    Fixes text split for parameters

    Make text split only on the first "=" element, this will
    allow for values to have multiple "=" in the string.
    Also, ensure that key = value pair is honored in parameters,
    exit otherwise with error message. Tests included.
    Fixes bug #1183842

    Change-Id: Ic8897405c61dee49f5927b53f055b0d0686eea7d