new_contents: class slpschedmanager(object):
      def __init__(self, pesys):
          self._log = pesys.log
          self._loader = pesys.loader
      
      def create(self, schedtype):
          pass
  
  class slpscheduler(object):
      def query(self, *args):
          pass
  
      def callslp(self, *args):
          pass
  
subject: add slp scheduler