Drop the 'parameters-extra' option and always forward extra parameters

There was an inconsistency between the 2 ways of creating executable wrappers:
- createWrapper: parameters-extra defaults to False
- slapos.recipe.librecipe.execute.generic_exec: no option, enabled

An option for that is not worth the effort.
Let's always enable even if it's meaningless.

/software/ and /stack/ will be cleaned up once a new version of this egg
is released.

slapos/recipe/librecipe/generic.py

@@ -137,7 +137,7 @@ class GenericBaseRecipe(object):
       path, arguments=', '.join(args))[0]
 
   def createWrapper(self, name, command, parameters, comments=(),
-      parameters_extra=False, environment=None,
+      environment=None,
   ):
     """
     Creates a basic shell script for process replacement.
@@ -159,8 +159,6 @@ class GenericBaseRecipe(object):
     lines.append('exec ' + shlex.quote(command))
 
     parameters = map(shlex.quote, parameters)
-    if parameters_extra:
-      # pass-through further parameters
     parameters.append('"$@"')
     for param in parameters:
       if len(lines[-1]) < 40:

slapos/recipe/notifier.py

@@ -108,7 +108,6 @@ class Notify(GenericBaseRecipe):
     return self.createWrapper(name=wrapper,
                               command=cmd[0],
                               parameters=cmd[1:],
-                              parameters_extra=True,
                               comments=[
                                   '',
                                   'Call an executable and send notification(s).',

slapos/recipe/wrapper.py

@@ -37,14 +37,12 @@ class Recipe(GenericBaseRecipe):
 
     :param lines wait-for-files: list of files to wait for
     :param str pidfile: path to pidfile ensure exclusivity for the process
-    :param bool parameters-extra: whether wrapper parameters are passed onto command
     :param bool reserve-cpu: command will ask for an exclusive CPU core
     """
     def install(self):
         command_line = shlex.split(self.options['command-line'])
         wrapper_path = self.options['wrapper-path']
         wait_files = self.options.get('wait-for-files')
-        parameters_extra = self.options.get('parameters-extra')
         pidfile = self.options.get('pidfile')
 
         environment = {}
@@ -75,5 +73,4 @@ class Recipe(GenericBaseRecipe):
         return self.createWrapper(wrapper_path,
           command_line[0],
           command_line[1:],
-          parameters_extra=self.isTrueValue(parameters_extra),
           environment=environment)