tests: Fix `/status' endpoint to cater for lists

We can now get list objects from the /status endpoint in the case of
having different versions of the same language module.

That led to this error

  >       return d1 - d2
  E       TypeError: unsupported operand type(s) for -: 'list' and 'list'

We already cover a similar case for when we have simple strings so add
this to that.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Author: ac000

test/unit/status.py

@@ -31,7 +31,7 @@ def find_diffs(d1, d2):
                     if k in d2
                 }
 
-            if isinstance(d1, str):
+            if isinstance(d1, str) or isinstance(d1, list):
                 return d1 == d2
 
             return d1 - d2