Rename testprocess cleanup to terminate.

tests/integration/quteprocess.py

@@ -184,4 +184,4 @@ def quteproc(qapp, httpbin):
     proc.start()
     yield proc
     proc.after_test()
-    proc.cleanup()
+    proc.terminate()

tests/integration/testprocess.py

@@ -141,7 +141,7 @@ class Process(QObject):
         if self._invalid:
             raise InvalidLine
 
-    def cleanup(self):
+    def terminate(self):
         """Clean up and shut down the process."""
         self.proc.terminate()
         self.proc.waitForFinished()