Define %python2 and %python3

See https://pagure.io/packaging-committee/issue/907

Redefine %__pythonX to change the behavior of %pythonX, %pythonX_version, etc.
Use %pythonX in spec.

epel-rpm-macros.spec

@@ -1,6 +1,6 @@
 Name:           epel-rpm-macros
 Version:        8
-Release:        1
+Release:        2
 Summary:        Extra Packages for Enterprise Linux RPM macros
 
 Group:          System Environment/Base
@@ -47,6 +47,9 @@ install -Dpm 644 %{SOURCE1} \
 
 
 %changelog
+* Mon Sep 30 2019 Miro Hrončok <mhroncok@redhat.com> - 8-2
+- Define %%python2 and %%python3
+
 * Wed Jun  5 2019 Stephen Smoogen <smooge@smoogen-laptop.localdomain> - 8-1
 - Make an initial macro set for 8. 
 

macros.epel-rpm-macros

@@ -16,3 +16,6 @@
 # Bash completions; not in bash to not intefere with install ordering
 %bash_completion_dir /usr/share/bash-completion/completions/
 
+# Use the non-underscored Python macros to refer to Python in spec, etc.
+%python2 %__python2
+%python3 %__python3