[content/test/gpu] Run pylint check of gpu tests in unittest instead of PRESUBMIT

third_party/logilab/logilab/astroid/brain/py2qt4.py

+"""Astroid hooks for the Python 2 qt4 module.
+
+Currently help understanding of :
+
+* PyQT4.QtCore
+"""
+
+from astroid import MANAGER, register_module_extender
+from astroid.builder import AstroidBuilder
+
+
+def pyqt4_qtcore_transform():
+    return AstroidBuilder(MANAGER).string_build('''
+
+def SIGNAL(signal_name): pass
+
+class QObject(object):
+    def emit(self, signal): pass
+''')
+
+
+register_module_extender(MANAGER, 'PyQt4.QtCore', pyqt4_qtcore_transform)