Failing tests on the ponos module

There are two tests on the ponos module that regularly fail:

• arkindex.ponos.tests.test_api.TestAPI.test_agent_non_pending_actions
  • AssertionError: 11 != 7 : 11 queries executed, 7 expected
  • example pipeline
• Missing support for an unset CPU load while computing next tasks
  • example pipeline
  • cpu_cost = (self.cpu_load + tasks * AGENT_SLOT["cpu"]) / self.cpu_cores (TypeError: unsupported operand type(s) for +: 'NoneType' and 'int')