macros; update python macros: centos7.7 has new enough python3
@@ -130,7 +130,7 @@ Requires: openmpi3-%{compiler_family}%{PROJ_DELIM}
%global python_module_prefix py3-
%global python_lib_dir python3.4
%if "%{rhel_version}" == "700"
-%global python_prefix python34
+%global python_prefix python3
%endif
%if 0%{?suse_version}
%global python_prefix python3
