[COMMON][DOC] Add documentation for Montral and GatewayAPI

Add override file to use GatewayAPI as Ingress provider
A precreated GW named "common-gateway" is used.
Added documentation for Montreal like release notes,
Infrastructure guides...

Issue-ID: OOM-3184
Issue-ID: OOM-3242

Change-Id: I18107bac52abf34dbc0b217fd8b7542ba51aab84
Signed-off-by: Andreas Geissler <andreas-geissler@telekom.de>
diff --git a/docs/sections/oom_project_description.rst b/docs/sections/oom_project_description.rst
index c2a0899..7742379 100644
--- a/docs/sections/oom_project_description.rst
+++ b/docs/sections/oom_project_description.rst
@@ -38,8 +38,8 @@
   service impact
 - **Delete** - cleanup individual containers or entire deployments
 
-OOM supports a wide variety of Kubernetes private clouds - built with Rancher,
-Kubeadm or Cloudify - and public cloud infrastructures such as: Microsoft
+OOM supports a wide variety of Kubernetes private clouds - built with ClusterAPI,
+Kubespray - and public cloud infrastructures such as: Microsoft
 Azure, Amazon AWS, Google GCD, VMware VIO, and OpenStack.
 
 The OOM documentation is broken into four different areas each targeted at a
@@ -51,8 +51,6 @@
 - :ref:`oom_user_guide` - a guide for operators of an OOM instance
 - :ref:`oom_access_info_guide` - a guide for operators who require access to OOM applications
 
-
-
 The :ref:`release_notes` for OOM describe the incremental features per release.
 
 Component Orchestration Overview