Force BSDs to use umount/mount instead of trying to use remount. (#5715)

* Force BSDs to use umount/mount instead of trying to use remount.

Fixes #5591

* Initialize out and err

lib/ansible/modules/system/mount.py

@@ -366,10 +366,20 @@ def remount(module, mount_bin, args):
 
     cmd += _set_fstab_args(args)
     cmd += [ args['name'], ]
+    out = err = ''
     try:
+        if get_platform().lower().endswith('bsd'):
+            # Note: Forcing BSDs to do umount/mount due to BSD remount not
+            # working as expected (suspect bug in the BSD mount command)
+            # Interested contributor could rework this to use mount options on
+            # the CLI instead of relying on fstab
+            # https://github.com/ansible/ansible-modules-core/issues/5591
+            rc = 1
+        else:
             rc, out, err = module.run_command(cmd)
     except:
         rc = 1
+
     if rc != 0:
         msg = out + err
         if ismount(args['name']):