_handle_problem(): If -p is passed, unittest displayed "OK"

at the end even if there were test failures and/or errors, and
didn't display any failure/error tracebacks at the end.  Now it
reports failures/errors at the end the same as when -p isn't
passed.

test.py

@@ -278,8 +278,7 @@ class ImmediateTestResult(unittest._TextTestResult):
         elif self.dots:
             self.stream.write(prefix[0])
             
-        if not self._progress:
-            errlist.append((test, tb))
+        errlist.append((test, tb))
 
     def startTest(self, test):
         if self._progress: