health: Rename required_cpu_hosts to required_hosts
health: Rename required_cpu_hosts to required_hosts

This variable wasn't cpu specific, so let's rename it to avoid confusion

lebauce/edeploy,enovance/edeploy,enovance/edeploy,redhat-cip/edeploy,lebauce/edeploy,redhat-cip/edeploy,lebauce/edeploy,enovance/edeploy,lebauce/edeploy,redhat-cip/edeploy,redhat-cip/edeploy,enovance/edeploy