Eliminate broad-except suppression

.pylintrc-tests

@@ -40,7 +40,6 @@ disable=
 	too-many-locals,
 	redefined-variable-type,
 	redefined-outer-name,
-	broad-except,
 	ungrouped-imports,
 	too-many-branches,
 	too-many-arguments,

src/python/grpcio_tests/tests/stress/test_runner.py

@@ -50,7 +50,7 @@ class TestRunner(threading.Thread):
                 test_case.test_interoperability(self._stub, None)
                 end_time = time.time()
                 self._histogram.add((end_time - start_time) * 1e9)
-            except Exception as e:
+            except Exception as e:  # pylint: disable=broad-except
                 traceback.print_exc()
                 self._exception_queue.put(
                     Exception("An exception occured during test {}"

src/python/grpcio_tests/tests/unit/_cython/test_utilities.py

@@ -25,7 +25,7 @@ class SimpleFuture(object):
         def wrapped_function():
             try:
                 self._result = function(*args, **kwargs)
-            except Exception as error:
+            except Exception as error:  # pylint: disable=broad-except
                 self._error = error
 
         self._result = None

src/python/grpcio_tests/tests/unit/_exit_test.py

@@ -49,7 +49,7 @@ def cleanup_processes():
         for process in processes:
             try:
                 process.kill()
-            except Exception:
+            except Exception:  # pylint: disable=broad-except
                 pass