[OE-core] rpm: Recover RPM4 to OE-core

[Fan Xin]

Hi Joshua,

Thanks for your info.

Actually, our origin motivation is that we found smartpm is not 
maintained any more. We maintain smartpm for our distro at
https://github.com/ubinux/smart2

Then we realize smartpm should switch to python3. In order to solve this 
issue, there are four solutions as follows.

[1] smart/RPM5
[2] smart/RPM4
[3] dnf/RPM5
[4] dnf/RPM4

I confirm that RPM5 have some bugs with python3 and I am not familiar 
with RPM. So I think the easy way to solve this issue is [2], recover 
RPM4 and solve the bugs in smartpm.

>
> It's also worth pointing out that we're strongly considering dropping
> SMART in the next (2.3) development cycle[4].
>
Considering YP would like to drop smart in 2.3, I wonder YP would use 
[3]dnf/RPM5 or [4]dnf/RPM4 ?

> Do you have a reason for wanting rpm4 beyond the proven Python3
> support?
No, I just think python3 support issue should be solved. I am fine with 
RPM4 or RPM5 or smart or dnf.

Best Regards,

Fan

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