Checkmk Werk 13149: isstore, isclienttype: fix performance problems

ID: 13149 Title: isstore, isclienttype: fix performance problems Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 If a section contained large numbers the running time of the discovery and checking was increased. For big numbers like 18446744073664412644 it could take minutes to complete. This is fixed. SUP-7439