graalpytest.py: make load_module a regular method

Author: cosminbasca

graalpython/com.oracle.graal.python.test/src/graalpytest.py

@@ -579,8 +579,7 @@ def find_conftest(test_module_path):
             return join(test_module_dir, "conftest.py")
         return None
 
-    @staticmethod
-    def load_module(path):
+    def load_module(self, path):
         name = path.rpartition("/")[2].partition(".")[0].replace('.py', '')
         directory = path.rpartition("/")[0]
         pkg = []
@@ -621,10 +620,10 @@ def load_module(path):
 
     def test_modules(self):
         for testfile in self.testfiles:
-            yield TestRunner.load_module(testfile)
+            yield self.load_module(testfile)
 
     def load_conftest(self, testfile):
-        TestRunner.load_module(testfile)
+        self.load_module(testfile)
 
     def run(self):
         # eval session scope