fix structure: move toctree to the end

- the introduction to the topic only appeared at the end of the page
- visible in the HTML output (and even more visible if you build PDF from RST)

Change-Id: I7f86b50027a52531ec76a849aeab8540e7c1ea1e

doc/common/get-started-with-openstack.rst

@@ -2,14 +2,6 @@
 Get started with OpenStack
 ==========================
 
-.. toctree::
-   :maxdepth: 2
-
-   get-started-conceptual-architecture.rst
-   get-started-logical-architecture.rst
-   get-started-openstack-services.rst
-   get-started-feedback.rst
-
 The OpenStack project is an open source cloud computing platform for all
 types of clouds, which aims to be simple to implement, massively
 scalable, and feature rich. Developers and cloud computing technologists
@@ -89,3 +81,10 @@ OpenStack architecture:
        by specifying parameters like Hadoop version, cluster topology and nodes
        hardware details.
 
+.. toctree::
+   :maxdepth: 2
+
+   get-started-conceptual-architecture.rst
+   get-started-logical-architecture.rst
+   get-started-openstack-services.rst
+   get-started-feedback.rst