Some bugfixes for User Guide

- structural XMLfixes

Change-Id: Ieebe357de841356b40c5f2456763e69e6514d672
Closes-Bug: #1419015
Closes-Bug: #1418998
Closes-Bug: #1419003

doc/user-guide/section_cli_heat.xml

@@ -121,7 +121,7 @@
     </section>
     <section xml:id="update_stack">
         <title>Update a stack</title>
-                <para xml:id="heat-stack-update">To update an existing stack from a modified
+                <para>To update an existing stack from a modified
                     template file, run a command like the following
                     command:</para>
                 <screen><prompt>$</prompt> <userinput>heat stack-update mystack --template-file /path/to/heat/templates/WordPress_Single_Instance_v2.template</userinput>

doc/user-guide/section_cli_nova_configure_instances.xml

@@ -151,13 +151,13 @@
                 <para>To allow SSH access to the instances, choose one of the
                     following options:</para>
                 <itemizedlist>
-                    <listitem xml:id="sec_group_rule_add">
+                    <listitem>
                         <para>Allow access from all IP addresses, specified as
                             IP subnet <filename>0.0.0.0/0</filename> in CIDR
                             notation:</para>
                         <screen><prompt>$</prompt> <userinput>nova secgroup-add-rule <replaceable>SECURITY_GROUP_NAME</replaceable> tcp 22 22 0.0.0.0/0</userinput></screen>
                     </listitem>
-                    <listitem xml:id="sec_group_rule_add_alt">
+                    <listitem>
                         <para>Allow access only from IP addresses from other
                             security groups (source groups) to access the
                             specified port:</para>

doc/user-guide/section_sdk_nova.xml

@@ -194,8 +194,6 @@ from novaclient.client import Client</programlisting>
                                 <literal>server_exists</literal> to
                                 <literal>True</literal> and break from
                                 the for loop:</para>
-                    </step>
-                </substeps>
                          <programlisting language="python">servers_list = nova_client.servers.list()
 server_del = "vm1"
 server_exists = False
@@ -206,6 +204,8 @@ for s in servers_list:
         server_exists = True
         break</programlisting>
                     </step>
+                </substeps>
+            </step>
             <step>
                 <para>If the server exists, run the
                         <literal>delete</literal> method of the