[JENKINS-29037] waitUntil: Make maximum recurrence period configurable

[HannesWell]

As suggested also in #7 (comment) ff, this adds a maxRecurrencePeriod parameter.

Fixes #395

Testing done

Extended the existing WaitForConditionStepTest class by a new case maxRecurrence() that sets deliberately a very low max limit in order to test that this limit is hit and maintained.
I'm not sure if there is a convenient method to verify that that there are no other wait periods printed.

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