Checkmk Werk 12314: checks: Fix "MS Exchange Information Store" rule crash

ID: 12314 Title: checks: Fix "MS Exchange Information Store" rule crash Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 The checks msexch_isclienttype and msexch_isstore crashed with "AttributeError: 'tuple' object has no attribute 'get'" if the rule "MS Exchange Information Store" existed. This should now be fixed.