Werk #12888: Adjusting discards to accept Float instead Integer levels

Component	Checks & agents
Title	Adjusting discards to accept Float instead Integer levels
Date	Jun 2, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p7 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0p25 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

For some checks based on the interfaces valuespecs, integers did not provide the necessary granularity to set thresholds. In consequence, this change changes the levels to float types.

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