Revert "use fail() instead of notify which cause an immediately restart without proper cleanup in node.py"

This reverts commit 4708b53e7c12a729484b0425df55b6da04ea0921.
Revert "fix service monitor fail"

This reverts commit 28ba80eb1cf8c3acd76838e939b5af66733bb80e.
Revert "fix tests"

This reverts commit 299adefc89877782e94addfe6c6d880e34ca7bdb.
revert old monitor network error fix, add actioncommand unknown property, monitor task requeue on restore
Merge pull request #293 from yyejun/fix_monitor_task_requeue

Fix monitor task requeue