EPEL7: Adapting %python_provide to provide python3- for python36-

[Miro Hrončok]

Hey,

since the plan is to have some python3-... packages in RHEL proper, should we 
adapt the %python_provide macro to provide python3-... when it gets python36-...?

%{python_provide python36-foo} currently does nothing.
I propose to change it to do: Provides: python3-foo = %{version}-%{release}.

Note: %{python_provide python2-foo} currently adds obsoletes, let's not add them 
for the python36 case (there is nothing to obsolete here, quite the opossite - 
python3-foo from RHEL would in theory obsolete python36-foo from EPEL).

Arguably, this discussion should have happened before we did the mass rebuild 
for 3.4 -> 3.6 transition, however I don't consider such provides essential. The 
idea is to change the macro, but don't mass rebuild - instead start providing 
the provides gradually.

Note that not all EPEL7 Python 3 packages use this macro, but many do.

-- 
Miro Hrončok
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