grid.promise: add support for promise without test or anomaly
Support for promise test-less or anomaly-less allow to disable either the test phase or the anomaly phase.
by default, test and anomaly are enabled, __is_tested = True and __is_anomaly_detected = True. Test will run when buildout is processing the computer partition, and anomaly when the partition is processed.
Call self.setTestLess() in __init__.py of the promise will disable Test and set __is_tested = False. Call self.setAnomalyLess() will rather disable Anomaly and set __is_anomaly_detected = False.
def __init__(self, config):
GenericPromise.__init__(self, config)
# Skip test check on this promise
self.setTestLess()If the promise is test less, then slapgrid will not run the promise while processing the partition which mean that the promise will not report error, only Anomaly will be checked. Samething, if promise is anomaly less, only test will run when slapgrid is processing the partition.