Title: RHEV REST API Invalid XML Example

Describe the issue:
The XML Example is syntactically invalid.
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.4/html-single/Technical_Guide/index.html#Power_Management_Elements

- It contains values outside of tags (order="primary")
- value is missing = (value "false">)

        <agents>
            <agent type="rsa">
                <address>192.168.1.111</address>
                <username>e.xample</username> order="primary"
                <password>p@55w0rd!</password>
                <options>
                    <option name="443" value="true"/> 
                    <option name="secure" value "false"/>
                </options>
                <concurrent>false</concurrent>
                <order>1</order>
            </agent>
            <agent type="ipmi">
                <address>192.168.1.112</address>
                <username>e.xample</username> order="primary"
                <password>p@55w0rd!</password>
                <options>
                    <option name="443" value="true"/> 
                    <option name="secure" value "false"/>
                </options>
                <concurrent>false</concurrent>
                <order>2</order>
            </agent>


Versions Applicable: 3.5, 3.4