testenv: HTTPTest.begin() should return exit value

* testenv/test/http_test.py: Ensure that HTTPTest.begin() always returns
a value

Previously the HTTPTest.begin() method always returned None. However this
is not consistent with the begin() implementation of the parent class
(BaseTest). This change ensures that HTTPTest.begin() returns a value.

Signed-off-by: Tomas Hozza <thozza@redhat.com>

testenv/test/http_test.py

@@ -42,7 +42,7 @@ class HTTPTest(BaseTest):
                 print_green("Test Passed.")
             else:
                 self.tests_passed = False
-            super(HTTPTest, self).begin()
+            return super(HTTPTest, self).begin()
 
     def instantiate_server_by(self, protocol):
         server = {HTTP: HTTPd,