[Python] fix paths for applis

I don't even understand this `/lib/`

scripts/test_kine.py

@@ -3,6 +3,7 @@ import sys
 import rospy
 import rospkg
 import time
+from os.path import abspath, dirname, join
 
 
 from std_srvs.srv import *
@@ -47,8 +48,7 @@ def runTest():
         # get the file path for rospy_tutorials
         lpath = rospack.get_path(PKG_NAME)
         print(lpath)
-        initCode = open( lpath + '/../../lib/'+PKG_NAME+'/appli.py',\
-                         "r").read().split("\n")
+        initCode = open(join(dirname(abspath(__file__)), 'appli.py'), "r").read().split("\n")
 
         rospy.loginfo("Stack of Tasks launched")
 

scripts/test_sot_talos_balance.py

@@ -5,6 +5,7 @@ import rospkg
 import time
 import unittest
 import math
+from os.path import abspath, dirname, join
 
 from std_srvs.srv import *
 from dynamic_graph_bridge_msgs.srv import *
@@ -23,8 +24,7 @@ rospack = rospkg.RosPack()
 # get the file path for rospy_tutorials
 lpath = rospack.get_path(PKG_NAME)
 print(lpath)
-appli_file_name =lpath + '/../../lib/'+PKG_NAME+\
-    '/appli_dcmZmpControl_file.py'
+appli_file_name = join(dirname(abspath(__file__)), 'appli_dcmZmpControl_file.py')
 
 time.sleep(2)
 rospy.loginfo("Stack of Tasks launched")