Make autocost bandwidth calculation a floor division for Py3 compatibility (#66095)

Signed-off-by: NilashishC <nilashishchakraborty8@gmail.com>
(cherry picked from commit 06927eab1f)

Add changelog for nxos_ospf_vrf fix

Signed-off-by: NilashishC <nilashishchakraborty8@gmail.com>

changelogs/fragments/66095_fix_nxos_ospf_vrf.yaml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - Fix bandwidth calculation in nxos_ospf_vrf for Python 3 (https://github.com/ansible/ansible/pull/66095)

lib/ansible/modules/network/nxos/nxos_ospf_vrf.py

@@ -299,7 +299,7 @@ def state_present(module, existing, proposed, candidate):
                 if len(value) < 5:
                     command = '{0} {1} Mbps'.format(key, value)
                 else:
-                    value = str(int(value) / 1000)
+                    value = str(int(value) // 1000)
                     command = '{0} {1} Gbps'.format(key, value)
             elif key == 'bfd':
                 command = 'no bfd' if value == 'disable' else 'bfd'