Fix broken multiprocessing API in some Python versions

Check nipy/nipype#2754 for more details

Fixes ai4os#95

Author: alvarolopez

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Drop support for V1 API.
 
 ### Fixed
+- Fix broken multiprocessing API in some Python versions (#95)
 - Updated documentation.
 
 ### Security

deepaas/model/v2/wrapper.py

@@ -365,7 +365,11 @@ def daemon(self, value):
 
 class NonDaemonPool(multiprocessing.pool.Pool):
     # Based on https://stackoverflow.com/questions/6974695/
-    Process = NonDaemonProcess
+    def Process(self, *args, **kwds):
+        proc = super(NonDaemonPool, self).Process(*args, **kwds)
+        proc.__class__ = NonDaemonProcess
+
+        return proc
 
 
 class CancellablePool(object):