[python] Applies relocation principle which implies to have empty

__init__.py
Modifies meta_taks_6d and meta_tasks_kine accordingly.

src/dynamic_graph/sot/core/__init__.py

-# flake8: noqa
-from .exp_moving_avg import *
-from .feature_generic import *
-from .feature_joint_limits import *
-from .feature_point6d import *
-from .feature_pose import *
-from .feature_position import *
-from .feature_position_relative import *
-from .feature_posture import *
-from .feature_visual_point import *
-from .gain_adaptive import *
-from .gradient_ascent import *
-from .joint_limitator import *
-from .kalman import *
-from .math_small_entities import *
-from .op_point_modifier import *
-from .robot_simu import *
-from .sot import *
-from .task import *
-from .task_pd import *
-from .visual_point_projecter import *

src/dynamic_graph/sot/core/meta_task_6d.py

@@ -2,7 +2,7 @@ from dynamic_graph import plug
 from dynamic_graph.sot.core.feature_point6d import FeaturePoint6d
 from dynamic_graph.sot.core.gain_adaptive import GainAdaptive
 from dynamic_graph.sot.core.op_point_modifier import OpPointModifier
-from dynamic_graph.sot.core.sot import Task
+from dynamic_graph.sot.core.task import Task
 
 
 def toFlags(arr):

src/dynamic_graph/sot/core/meta_tasks_kine.py

@@ -4,7 +4,7 @@ from dynamic_graph.sot.core.meta_task_6d import MetaTask6d
 # TODO: this function is imported from meta_tasks_kine in several places, whereas it is defined in meta_tasks
 from dynamic_graph.sot.core.meta_tasks import gotoNd  # noqa
 from dynamic_graph.sot.core.meta_tasks import MetaTaskCom
-from dynamic_graph.sot.core.sot import Task
+from dynamic_graph.sot.core.task import Task
 
 
 class MetaTaskKine6d(MetaTask6d):