Description of problem:
Rest API does not allow user to specify ssh key type upon creating domain.

Version-Release number of selected component (if applicable):
rubygem-cloud-sdk-common-0.4.1-1.el6_2.noarch
rubygem-cloud-sdk-controller-0.4.1-1.el6_2.noarch
rubygem-cloud-sdk-node-0.4.1-1.el6_2.noarch


How reproducible:
Always

Steps to Reproduce:
1. Access rest api link.
$ curl -k -X GET -H "Accept: application/xml" --user jialiu:xx  https://ec2-23-20-21-246.compute-1.amazonaws.com/broker/rest/api
<--snip-->
    <link>
      <rel>Create new domain</rel>
      <method>POST</method>
      <href>/domains</href>
      <required-params>
        <param>
          <type>string</type>
          <name>namespace</name>
          <valid-options/>
          <description>Name of the domain</description>
        </param>
        <param>
          <type>string</type>
          <name>ssh</name>
          <valid-options/>
          <description>The key portion of an rsa key (excluding ssh-rsa and comment)</description>
        </param>
      </required-params>
      <optional-params/>
    </link>
<--snip-->
2.
3.
  
Actual results:
Rest API does not allow user to specify ssh key type upon creating domain.

Expected results:
Should allow user to specify ssh key type as optional param upong creating domain.

Additional info: