Tests: unified setup method usage.

To make fixtures accessible inside of setup methods in tests all these methods
are renamed to the "setup_method_fixture" and decorated by autouse flag.

Also all setup methods moved to the top of the files.

test/test_python_procman.py

@@ -11,8 +11,9 @@ from unit.option import option
 class TestPythonProcman(TestApplicationPython):
     prerequisites = {'modules': {'python': 'any'}}
 
-    def setup_method(self):
-        self.app_name = f'app-{option.temp_dir.split("/")[-1]}'
+    @pytest.fixture(autouse=True)
+    def setup_method_fixture(self, temp_dir):
+        self.app_name = f'app-{temp_dir.split("/")[-1]}'
         self.app_proc = f'applications/{self.app_name}/processes'
         self.load('empty', self.app_name)