Address issue of python36-libvirt for kvm/SG CentOS users (apache#135)

* address issue of python36-libvirt for kvm/SG CentOS users

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

* Update source/releasenotes/about.rst

Co-authored-by: dahn <daan.hoogland@gmail.com>
Co-authored-by: Andrija Panic <45762285+andrijapanicsb@users.noreply.github.com>
Co-authored-by: dahn <daan.hoogland@gmail.com>

Author: 3 people

source/installguide/hypervisor/kvm.rst

@@ -153,6 +153,7 @@ In RHEL or CentOS:
 
 .. parsed-literal::
 
+   $ yum install -y epel-release
    $ yum install cloudstack-agent
 
 In Ubuntu:

source/installguide/hypervisor/lxc.rst

@@ -149,6 +149,7 @@ In RHEL or CentOS:
 
 .. parsed-literal::
 
+   $ yum install -y epel-release
    $ yum install cloudstack-agent
 
 In Ubuntu:

source/quickinstallationguide/qig.rst

@@ -536,6 +536,7 @@ afterwards we'll need to configure a few things.
 
 .. parsed-literal::
 
+   # yum -y install epel-release
    # yum -y install cloudstack-agent
 
 

source/releasenotes/about.rst

@@ -46,6 +46,11 @@ The full list of new features can be found in the project release notes at http:
 
 Apache CloudStack powers numerous elastic Cloud computing services, including solutions that have ranked as Gartner Magic Quadrant leaders. Highlighted in the Forrester Q4 2017 Enterprise Open Source Cloud Adoption report, Apache CloudStack "sits beneath hundreds of service provider clouds", including Fortune 5 multinational corporations. A list of known Apache CloudStack users are available at http://cloudstack.apache.org/users.html
 
+Libvirt Python Dependency on KVM and CentOS
+===========================================
+
+For CentOS users using the security groups feature on KVM it is needed to install the epel-release and python36-libvirt packages.
+
 New User Interface & Depreciation notice of existing UI
 =======================================================
 
@@ -58,4 +63,3 @@ The next LTS release (likely to be version 4.15) of Apache Cloudstack will ship
 In the following release (likely to be 4.16), the old UI will be deprecated.
 
 Please see `Primate install guide <../installguide/primate.html>`_
-

source/upgrading/upgrade/upgrade-4.11.rst

@@ -302,6 +302,8 @@ For KVM hosts, upgrade the ``cloudstack-agent`` package
 
    .. parsed-literal::
 
+      $ sudo yum install -y epel-release
+      $ sudo yum install -y python36-libvirt
       $ sudo yum upgrade cloudstack-agent
 
 #. Restart the agent:

source/upgrading/upgrade/upgrade-4.13.rst

@@ -281,6 +281,8 @@ For KVM hosts, upgrade the ``cloudstack-agent`` package
 
    .. parsed-literal::
 
+      $ sudo yum install -y epel-release
+      $ sudo yum install -y python36-libvirt
       $ sudo yum upgrade cloudstack-agent
 
 #. Restart the agent:

source/upgrading/upgrade/upgrade-4.9.rst

@@ -383,6 +383,8 @@ For KVM hosts, upgrade the ``cloudstack-agent`` package
 
    .. parsed-literal::
 
+      $ sudo yum install -y epel-release
+      $ sudo yum install -y python36-libvirt
       $ sudo yum upgrade cloudstack-agent
 
 #. Verify that the file ``/etc/cloudstack/agent/environment.properties`` has a