Fedora template is not compatible with EPELs

`pyp2rpm` generates:

```
%{?python_provide:%python_provide python3-%{pypi_name}}
```

(`pyp2rpm` tested with fedora/24-cloud-base vagrant)

Unfortunately, this fails on EPEL7 (tested using copr), Fedora works well.
Orion Poplawski suggests in https://bugzilla.redhat.com/show_bug.cgi?id=1336097 the following:

```
%{?python_provide:%python_provide python%{python3_pkgversion}-%{srcname}}
```

I can confirm this works, but there is still an issue with EPEL6.

The module I tried to build is `nemea-pytrap` at pypi.