Werk #7416: k8s_resources: now uses default levels of 90% and 95?%

Component	Checks & agents
Title	k8s_resources: now uses default levels of 90% and 95?%
Date	Apr 24, 2019
Level	Trivial Change
Class	New Feature
Compatibility	Incompatible - Manual interaction might be required
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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