Build: move version handling from Makefile to configure

Version information is now in VERSION.m4 instead of VERSION.
Makefile target version-update was minimized and configure can be run
before make. Makefile temporarily contains hardcoded version which has
to match the one specified in VERSION.m4.

This is preparatory step which will allow us to replace hand-made
Makefile with one generated by Automake.

https://fedorahosted.org/freeipa/ticket/6418

Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

ipasetup.py.in

@@ -19,7 +19,7 @@ import os
 import sys
 
 common_args = dict(
-    version="__VERSION__",
+    version="@VERSION@",
     license="GPL",
     author="FreeIPA Developers",
     author_email="freeipa-devel@redhat.com",