slapos: allow usage of pidfile in wrapper recipe

The 'pidfile' parameter is passed to 'createWrapper' method in order to
avoid concurrent calls.

slapos/recipe/wrapper.py

@@ -37,6 +37,7 @@ class Recipe(GenericBaseRecipe):
         wait_files = self.options.get('wait-for-files')
         environment = self.options.get('environment')
         parameters_extra = self.options.get('parameters-extra')
+        pidfile = self.options.get('pidfile')
 
         if not wait_files and not environment:
           # Create a simple wrapper as shell script
@@ -45,6 +46,7 @@ class Recipe(GenericBaseRecipe):
              command=command_line[0],
              parameters=command_line[1:],
              parameters_extra=parameters_extra,
+             pidfile=pidfile,
           )]
 
         # More complex needs: create a Python script as wrapper
@@ -72,5 +74,7 @@ class Recipe(GenericBaseRecipe):
              name=wrapper_path,
              command=python_script,
              parameters=[],
-             parameters_extra=parameters_extra) ]
+             parameters_extra=parameters_extra,
+             pidfile=pidfile,
+        )]