Werk #10209: Active checks: Autodetect active checks which have a WATO configuration page

It is now possible to override the builtin active checks by copying them to the local hierarchy of the monitoring site. Checks created with the WATO > Host & service parameters > Active checks rulesets are now automatically using active checks in the local hierarchy when they are available.

If you want to use your own path defined via $USER*$ then you have to copy the check file share/check_mk/checks/check_ACTIVE_CHECK_NAME to the local hierarchy, ie. local/share/check_mk/checks/check_ACTIVE_CHECK_NAME and adapted the command_line within this file: "command_line": "$USER*$/check_ACTIVE_CHECK_NAME $ARG1$",