Extend OpenStack related hypervisor detection (#15166)

* fixed detection of ansible_virtualization_(role|path) facts for VM's running in
OpenStack Instances

* NOTE: this will break detection of ansible_virtualization_(role|path) facts
        if you are using Openstack Instaces with nested virtualization

* fixed detection of ansible_virtualization_(role|path) facts for VM's running in
OpenStack Instances

Fixes #15165

* NOTE: this will break detection of ansible_virtualization_(role|path) facts
        if you are using Openstack Instaces with nested virtualization

lib/ansible/module_utils/facts.py

@@ -3259,6 +3259,11 @@ class LinuxVirtual(Virtual):
             self.facts['virtualization_role'] = 'guest'
             return
 
+        if product_name == 'OpenStack Nova':
+            self.facts['virtualization_type'] = 'openstack'
+            self.facts['virtualization_role'] = 'guest'
+            return
+
         bios_vendor = get_file_content('/sys/devices/virtual/dmi/id/bios_vendor')
 
         if bios_vendor == 'Xen':
@@ -3294,6 +3299,11 @@ class LinuxVirtual(Virtual):
             self.facts['virtualization_role'] = 'guest'
             return
 
+        if sys_vendor == 'OpenStack Foundation':
+            self.facts['virtualization_type'] = 'openstack'
+            self.facts['virtualization_role'] = 'guest'
+            return
+
         if os.path.exists('/proc/self/status'):
             for line in get_file_lines('/proc/self/status'):
                 if re.match('^VxID: \d+', line):