[Feature request] support of Centos 8

[Sispheor]

The package seems to be officially supported.

Here is the error I got during the playbook deployment

ASK [mrlesmithjr.kea-dhcp : redhat | Installing Kea DHCP Packages] ***************************************************************************************************************************************
FAILED - RETRYING: redhat | Installing Kea DHCP Packages (3 retries left).
FAILED - RETRYING: redhat | Installing Kea DHCP Packages (2 retries left).
FAILED - RETRYING: redhat | Installing Kea DHCP Packages (1 retries left).
fatal: [helper.ocp44-01.c4lab.local]: FAILED! => {"attempts": 3, "changed": false, "failures": [], "msg": "Depsolve Error occured: \n Problem: cannot install the best candidate for the job\n  - nothing provides /usr/bin/python needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64\n  - nothing provides libboost_system.so.1.53.0()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64\n  - nothing provides liblog4cplus-1.1.so.9()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64\n  - nothing provides libmysqlclient.so.18()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64", "rc": 1, "results": []}

If I try to install manually

root@helper centos]# yum install isc-kea
.....
Error: 
 Problem: cannot install the best candidate for the job
  - nothing provides /usr/bin/python needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64
  - nothing provides libboost_system.so.1.53.0()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64
  - nothing provides liblog4cplus-1.1.so.9()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64
  - nothing provides libmysqlclient.so.18()(64bit) needed by isc-kea-1.7.8-isc0023920200525101542.el7.x86_64
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

Python is not present as now python3 is the only one installed on a RH8 based system. And I would avoid installing back python2...