tx content before

<data xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
        <mapping-nodes xmlns="urn:opendaylight:mdsal:mapping:test">
            <mapping-node>
                <id>node1-merge</id>
                <content>overwritten old content node1</content>
            </mapping-node>
            <mapping-node>
                <id>new-node5</id>
                <content>new node5 content</content>
            </mapping-node>
            <mapping-node>
                <id>new-node6</id>
                <content>new node6 content</content>
            </mapping-node>
            <mapping-node>
                <id>node2-merge</id>
                <content>overwritten old content node2</content>
            </mapping-node>
        </mapping-nodes>
        <top xmlns="urn:opendaylight:mdsal:mapping:test">
            <users>
                <user>
                    <name>single user</name>
                    <type>superuser</type>
                    <full-name>i replaced everything</full-name>
                    <company-info>
                        <dept>2</dept>
                        <id>2</id>
                    </company-info>
                </user>
            </users>
            <modules>
                <module>
                    <id>module1</id>
                    <type>type1</type>
                    <desc>module1-desc</desc>
                </module>
                <module>
                    <id>module2</id>
                    <type>type1</type>
                    <desc>module2-desc</desc>
                </module>
                <module>
                    <id>module3</id>
                    <type>unknown</type>
                    <desc>module3-desc</desc>
                </module>
                <module>
                    <id>new module</id>
                    <type>merged module</type>
                    <desc>merged module desc</desc>
                </module>
            </modules>
        </top>
    </data>