Werk #8049: Fix exception of cmcrushd on RedHat 5.X

Component	The Checkmk Micro Core
Title	Fix exception of cmcrushd on RedHat 5.X
Date	May 2, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.5i3 Checkmk Pro, Checkmk Ultimate MT

Problem is due to an alternative behaviour of Python when sys.exit is being called.

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