Add link pip to pip3 and undo delete __pycache__

.gitlab-ci.yml

@@ -22,10 +22,9 @@ workflow:
     # Upgrade pip
     - unset PYTHONPATH
     - ${PYTHON_ROOT}/bin/pip3 install -q --no-cache-dir --upgrade pip
+    - ln -s pip3 ${PYTHON_ROOT}/bin/pip
     # Fix python shebang to make it independent of install path
     - grep -I -r -l  "^#\!.*/bin/python.*$" ${PYTHON_ROOT}  | xargs sed -i '1c\#\!/usr/bin/env python'
-    # Clean pycache
-    - find ${PYTHON_ROOT} -iname __pycache__ -print0 | xargs -0 rm -rf
   artifacts:
     name: ${NAME}
     paths: