Package ipapython, ipalib, ipaplatform, ipatests for Python 3

Running make with PYTHON=/usr/bin/python3 will build/install the
bits for Python 3.

Executable scripts in ipatests have symlinks Python version suffixes
as per Fedora guidelines. Suffix-less names point to the Python 2 versions.

Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipapython/ipap11helper/Makefile

@@ -1,15 +1,14 @@
-PYTHONLIBDIR ?= $(shell  python2 -c "from distutils.sysconfig import *; print get_python_lib()")
-PACKAGEDIR ?= $(DESTDIR)/$(PYTHONLIBDIR)/ipa
-CONFIGDIR ?= $(DESTDIR)/etc/ipa
+PYTHON ?= /usr/bin/python2
+PYTHONLIBDIR ?= $(shell $(PYTHON) -c "from distutils.sysconfig import *; print(get_python_lib())")
 
 all:
-	python2 setup.py build
+	$(PYTHON) setup.py build
 
 install:
 	if [ "$(DESTDIR)" = "" ]; then \
-		python2 setup.py install; \
+		$(PYTHON) setup.py install; \
 	else \
-		python2 setup.py install --root $(DESTDIR); \
+		$(PYTHON) setup.py install --root $(DESTDIR); \
 	fi
 
 clean: