Merge branch '2.8.x' of https://github.com/centreon/centreon into 2.8.x

doc/en/administration_guide/02e.rst

doc/en/administration_guide/03stats.rst

doc/en/administration_guide/backup.rst

doc/en/administration_guide/index.rst

doc/en/administration_guide/partitioning/index.rst

doc/en/api/clapi/objects/engine_cfg.rst

doc/en/api/clapi/objects/index.rst

doc/en/api/clapi/objects/service_templates.rst

doc/en/api/restApi/index.rst

doc/en/configuration_guide/advanced_configuration/macros.rst

...nfiguration_guide/advanced_configuration/metaservices.rst

doc/en/configuration_guide/category.rst

doc/en/configuration_guide/contact.rst

doc/en/configuration_guide/imp/index.rst

doc/en/configuration_guide/poller/03wizards.rst

doc/en/configuration_guide/poller/index.rst

doc/en/developer/index.rst

doc/en/exploitation_guide/01customview.rst

doc/en/exploitation_guide/general/index.rst

doc/en/exploitation_guide/monitoring/index.rst