paths.KDESTROY instead of "kdestroy" and paths.GETENT instead of "getent"

Affected modules:
  roles/ipaclient/library/ipahost.py
  roles/ipaclient/library/ipajoin.py
  roles/ipaclient/library/ipanss.py

The directories library and action_plugins do only contain ipaclient specific
modules and plugins. Therefore these directories should be located in the
ipaclient role directory.

With FreeIPA 4.5 the functions save_state and configure_nisdomain have gotten
new options. A version check has been added to ipaextras and ipanss to make
sure that the modules are also working with FreeIPA 4.4.

With ansible 2.3.1 it is possible to have one place as an additional utils
module to do all the needed steps to be able to generate the environment for
new and older ipa versions.

The library modules are now a lot smaller.

The minimal ansible version has been increased to 2.3.1.

In the future it might now also be possible to have a special
ansible_ipa_client version for ipa < 4.4 in this utils module.

If the client name is not resolvable, the call of client_dns will internally
result in a logger.error call for the failed update of the DNS records.

The call to standard_logging_setup is fixing the behaviour to bremore like
a debug call.