[dask] Making some entry-points picklable

bob/bio/face/config/preprocessor/face_detect.py

 #!/usr/bin/env python
 
 import bob.bio.face
+import functools
 
 # Detects the face and eye landmarks crops it using the detected eyes
-preprocessor = bob.bio.face.preprocessor.FaceDetect(
+preprocessor = functools.partial(bob.bio.face.preprocessor.FaceDetect,
   face_cropper = 'face-crop-eyes',
   use_flandmark = True
 )
 
 # Detects the face amd crops it without eye detection
-preprocessor_no_eyes = bob.bio.face.preprocessor.FaceDetect(
+preprocessor_no_eyes = functools.partial(bob.bio.face.preprocessor.FaceDetect,
   face_cropper = 'face-crop-eyes',
   use_flandmark = False
 )