Werk #7970: Fix possible AttributeError 'function' has no attribute 'get' exception during checking

ComponentCore & Setup
TitleFix possible AttributeError "function" has no attribute "get" exception during checking
Date2019-07-10 14:15:19
Checkmk EditionCheckmk Enterprise Edition (CEE)
Checkmk Version1.6.0b4,1.7.0i1
LevelTrivial Change
ClassBug Fix
CompatibilityCompatible - no manual interaction needed

In the moment a check timeout occured while checking a host when using the Microcore an exception like this could occur in all previous 1.6 releases:

An exception occured while processing host "beta"
Traceback (most recent call last):
File "/omd/sites/beta/lib/python/cmk_base/cee/keepalive.py", line 331, in do_keepalive
exit_code = host_config.exit_code_spec.get("timeout", 2)
AttributeError: 'function' object has no attribute 'get'