pylint: Skip redundant-u-string-prefix

Pylint 2.10 introduced new checker `redundant-u-string-prefix`:
> Used when we detect a string with a u prefix. These prefixes were
  necessary in Python 2 to indicate a string was Unicode, but since Python
  3.0 strings are Unicode by default.

There are ~40 emitted warnings right now. They can be fixed on
refactorings without any rush.

Fixes: freeipa/freeipa-healthcheck#244
Signed-off-by: Stanislav Levin <[email protected]>

pylintrc

@@ -109,6 +109,7 @@ disable=
     consider-using-with,  # pylint 2.8.0, contextmanager is not mandatory
     consider-using-max-builtin,  # pylint 2.8.0, can be more readable
     consider-using-min-builtin,  # pylint 2.8.0, can be more readable
+    redundant-u-string-prefix,  # pylint 2.10.0, too many unessential changes
 
 [REPORTS]