use Virtual resp. Virtualization Host consistently

Do not use Virtualized Host instead
https://bugzilla.suse.com/show_bug.cgi?id=1034064
SUSE/spacewalk#22644

modules/client-configuration/pages/virtualization.adoc

@@ -2,7 +2,8 @@
 = Virtualization
 
 You can use {productname} to manage virtualized clients.
-In this type of installation, a virtual host is installed on the {productname} Server to manage any number of virtual guests.
+In this type of installation, a virtualization host is installed on the {productname} Server to manage any number of virtual guests.
+Within this document, instead of "virtualization host" often the short form "virtual host" is used.
 If you choose to, you can install several virtual hosts to manage groups of guests.
 
 The range of capabilities that virtualized clients have depends on the third-party virtualization provider you choose.
@@ -23,7 +24,7 @@ For more information about using VHMs to manage virtualization, see xref:client-
 
 
 
-== Manage Virtualized Hosts
+== Manage Virtualization Hosts
 
 Before you begin, ensure that the client you want to use as a virtualization host has the ``Virtualization Host`` system type assigned to it.
 Navigate to menu:Systems[Systems List] and click the name of the client to use as a virtualization host.