fix(sentinel): sentinel.running_scripts will always increase more times and not reset
fix(sentinel): sentinel.running_scripts will always increase more times and not reset

when trigger a always fail scripts, sentinel.running_scripts will increase ten times, however it
only decrease one times onretry the maximum. and it will't reset, when it become
SENTINEL_SCRIPT_MAX_RUNNING, sentinel don't trigger scripts.

pmem/redis,pmem/redis,pmem/redis,pmem/redis