Well, the fact that you can run glxgears without the libGL errors are gone is a good indication.
If you want to know what package contains swrast_dri.so there are ways to answer this question for yourself, e.g locate the file and run dpkg -S on it. Please don’t ask me to read your yum-update logs and solve your platform issues. This is not an MFiX issue and is really out of scope for this forum. You might do better in an OpenGL or Ubuntu help forum.
– Charles