Watcher official install-guide

Currently watcher project does not have an official
install guide at [1]

This patch adds watcher install guide for rdo and debian.

install-guide is written following the document [2].

[1] https://docs.openstack.org/project-install-guide/ocata/
[2] https://docs.openstack.org/contributor-guide/project-install-guide.html

Change-Id: Idfae7286003f81222dadf91ddcaf95a42c7eb07f

install-guide/source/install-obs.rst

@@ -0,0 +1,34 @@
+.. _install-obs:
+
+
+Install and configure for openSUSE and SUSE Linux Enterprise
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This section describes how to install and configure the Infrastructure Optimization service
+for openSUSE Leap 42.1 and SUSE Linux Enterprise Server 12 SP1.
+
+.. include:: common_prerequisites.rst
+
+Install and configure components
+--------------------------------
+
+#. Install the packages:
+
+   .. code-block:: console
+
+      # zypper --quiet --non-interactive install
+
+.. include:: common_configure.rst
+
+
+Finalize installation
+---------------------
+
+Start the Infrastructure Optimization services and configure them to start when
+the system boots:
+
+.. code-block:: console
+
+   # systemctl enable openstack-watcher-api.service
+
+   # systemctl start openstack-watcher-api.service