Increase event QPS as a quick workaround for deployment probers

[aermakov-zalando]

Since https://github.com/zalando-incubator/stackset-controller/issues/31 is not solved, our probers still have to rely on monitoring Failed… events to figure out if the stackset is healthy. We currently determine if the events are 'old enough' by using a 1 minute range, but since EventBroadcaster has some fancy QPS logic inside, it will start dropping event updates at some point. Let's increase it even further for now as a quick hack.

[coveralls]

Pull Request Test Coverage Report for Build 1510

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 68.747%

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Totals
Change from base Build 1507:	0.0%
Covered Lines:	1575
Relevant Lines:	2291

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💛 - Coveralls

[aryszka]

:+1:

[mikkeloscar]

:+1: