Make facts detection work on OpenBSD with Python3

The traceback is the following:

    Traceback (most recent call last):
      File \"/tmp/ansible_8s0bj604/ansible_module_setup.py\", line 134, in <module>
        main()
      File \"/tmp/ansible_8s0bj604/ansible_module_setup.py\", line 126, in main
        data = get_all_facts(module)
      File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3641, in get_all_facts
      File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 3584, in ansible_facts
      File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 1600, in populate
      File \"/tmp/ansible_8s0bj604/ansible_modlib.zip/ansible/module_utils/facts.py\", line 1649, in get_memory_facts
    TypeError: translate() takes exactly one argument (2 given)

And the swapctl output is this:

    # /sbin/swapctl -sk
    total: 83090 1K-blocks allocated, 0 used, 83090 available

The only use of the code is to remove prefix in case they are present, so just
replacing them with empty space is sufficient.

(cherry picked from commit df145df962)

lib/ansible/module_utils/facts.py

@@ -1624,10 +1624,10 @@ class OpenBSDHardware(Hardware):
         # total: 69268k bytes allocated = 0k used, 69268k available
         rc, out, err = self.module.run_command("/sbin/swapctl -sk")
         if rc == 0:
-            swaptrans = maketrans(' ', ' ')
+            swaptrans = maketrans('kmg', '   ')
             data = out.split()
-            self.facts['swapfree_mb'] = int(data[-2].translate(swaptrans, "kmg")) // 1024
-            self.facts['swaptotal_mb'] = int(data[1].translate(swaptrans, "kmg")) // 1024
+            self.facts['swapfree_mb'] = int(data[-2].translate(swaptrans)) // 1024
+            self.facts['swaptotal_mb'] = int(data[1].translate(swaptrans)) // 1024
 
     def get_processor_facts(self):
         processor = []