whitelist falke E722 in system/lib.py

'E722 do not use bare except' wants us not to use except without type
restriction as it catches everything and the kitchen sink. Since we use
them to catch exceptions in test cases this is intentional as we implement
general purpose error handling on test failure there.

system/lib.py

@@ -194,7 +194,7 @@ class BaseTest(object):
     def check_output(self):
         try:
             self.verify_match(self.get_gold(), self.output, match_prepare=self.outputMatchPrepare)
-        except:
+        except:  # noqa: E722
             if self.captureResults:
                 if self.outputMatchPrepare is not None:
                     self.output = self.outputMatchPrepare(self.output)
@@ -207,7 +207,7 @@ class BaseTest(object):
         output = self.run_cmd(command, expected_code=expected_code)
         try:
             self.verify_match(self.get_gold(gold_name), output, match_prepare)
-        except:
+        except:  # noqa: E722
             if self.captureResults:
                 if match_prepare is not None:
                     output = match_prepare(output)
@@ -228,7 +228,7 @@ class BaseTest(object):
         try:
 
             self.verify_match(self.get_gold(gold_name), contents, match_prepare=match_prepare)
-        except:
+        except:  # noqa: E722
             if self.captureResults:
                 if match_prepare is not None:
                     contents = match_prepare(contents)
@@ -241,7 +241,7 @@ class BaseTest(object):
         contents = open(self.checkedFile, "r").read()
         try:
             self.verify_match(self.get_gold(), contents)
-        except:
+        except:  # noqa: E722
             if self.captureResults:
                 with open(self.get_gold_filename(), "w") as f:
                     f.write(contents)