qemu 4.1.0 output shifts to scientific notation at 1000mb, breaking
oslo.utils.
Problem here is that the qemu-img output shifts to scientific notation:
999 => 999 MiB
1000 => 1e+03 MiB
The regex in python-oslo-utils does not cover this.
This issue is likely regexp parsing "disk size: 1e+03 MiB" value.
These changes fix that.
Change-Id: I4c016865890135023ceb497de18d75ccebd5961a
Closes-Bug: 1864529