Document the 'max_services' config option (#1500)
Document the 'max_services' config option (#1500)

* Document the 'max_services' config option

* Document with the default value

DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core