Allow long test names in pylintrc.

Many test methods in unit tests have names much longer than 30
characters. I think this is fine for test method names, since they're
meant to be descriptive, but not necessarily short and memorable.

Review-Url: https://codereview.chromium.org/2192213002
Cr-Commit-Position: refs/heads/master@{#408786}

third_party/WebKit/Tools/Scripts/webkitpy/pylintrc

@@ -190,7 +190,7 @@ class-rgx=[A-Z_][a-zA-Z0-9]+$
 function-rgx=[a-z_][a-z0-9_]{2,30}$
 
 # Regular expression which should only match correct method names
-method-rgx=[a-z_][a-z0-9_]{2,30}$
+method-rgx=method-rgx=(([a-z_][a-z0-9_]{2,30})|(test_[a-z0-9_]{2,60}))$
 
 # Regular expression which should only match correct instance attribute names
 attr-rgx=[a-z_][a-z0-9_]{1,30}$