Calendar: exclusion of timeperiod is not working

[joschi99]

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BUG REPORT INFORMATION

Centreon Web version: 18.10

Centreon Engine version: 18.10

Centreon Broker version: 18.10

OS: CentOS 7.6

Steps to reproduce the issue:

1. On the documentation (https://documentation.centreon.com/docs/centreon-engine/en/latest/user/configuration/basics/object_definitions.html#obj-def-timeperiod) it should be possible to exclude some other calendar. The GUI doesn't offer a way to manage this, but the tables on databases are still there and the configuration will be exported correctly to the pollers with exclude directive

Describe the results you received:
The timeperiod directive "exclude" has no impact

Describe the results you expected:
The timeperiod has to be excluded