freeipa 4.4 is the first version that supports all needed functions.
Therefore a check has been added to make sure that ipadiscovery fails for
versions before 4.4.
The python bindings of ipa versions before 4.6 are having a different
structure.
ipa_python_version is the version gathered from ipapython.version.NUM_VERSION.
For ipa versions before 3.2.1, the version is generated from
ipapython.version.VERSION because NUM_VERSION changed the format two times
before 3.2.1.
The discovery was not working if a server has been specified. The domain has
been needed additionally. The domain is now gathered from the server name if
it is missing in this case.
The module is doing the same discovery that ipa-client-install is doing
internally. The results are saved into a structure named ipadiscovery for
the ansible module.
The discovery module is needed to be able to not depend on the definition
of the ipaservers group for example to get otp passwords, to be able to
join and to configure sssd and other services corretly.
