cuba_SchedulingMBean.removeExecutionHistory does not support maxPeriod=""

Support
#1

While invoke cuba_SchedulingMBean.removeExecutionHistory as ScheduledTask, and leaves maxPeriod parameter empty, system call cuba_SchedulingMBean.removeExecutionHistory with maxPeriod="", but cuba_SchedulingMBean.removeExecutionHistory does not handle empty maxPeriod.

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And then results in process error.

Happened both in cuba6.10 and cuba7.

#3

Hi.
Thank you for reporting the problem. We have created a GitHub issue