[Telemetry + tools/perf] Modify the pylint disable message to use symbolic name

tools/perf/page_sets/mse_cases.py

Index: tools/perf/page_sets/mse_cases.py
diff --git a/tools/perf/page_sets/mse_cases.py b/tools/perf/page_sets/mse_cases.py
index f78c6865f9d211a144915883e5454b5ff3f6dd1b..d87964aa6713138fca7d999a7b295f3462224f0f 100644
--- a/tools/perf/page_sets/mse_cases.py
+++ b/tools/perf/page_sets/mse_cases.py
@@ -26,21 +26,21 @@ class MseCasesPageSet(story.StorySet):
     urls_list = [
       'file://mse_cases/startup_test.html?testType=AV',
       'file://mse_cases/startup_test.html?testType=AV&useAppendStream=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=AV&doNotWaitForBodyOnLoad=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=AV&useAppendStream=true&doNotWaitForBodyOnLoad=true',
       'file://mse_cases/startup_test.html?testType=V',
       'file://mse_cases/startup_test.html?testType=V&useAppendStream=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=V&doNotWaitForBodyOnLoad=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=V&useAppendStream=true&doNotWaitForBodyOnLoad=true',
       'file://mse_cases/startup_test.html?testType=A',
       'file://mse_cases/startup_test.html?testType=A&useAppendStream=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=A&doNotWaitForBodyOnLoad=true',
-      # pylint: disable=C0301
+      # pylint: disable=line-too-long
       'file://mse_cases/startup_test.html?testType=A&useAppendStream=true&doNotWaitForBodyOnLoad=true',
     ]