Werk #7695: haproxy: Skip invalid lines which led to a crash while discovery

Component	Checks & agents
Title	haproxy: Skip invalid lines which led to a crash while discovery
Date	May 23, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0p17 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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