Dracut regenerate initrd w/ the right kernel

When picking the latest version of the kernel on i386 we should prioritize
PAE kernels. Debug kernels will be ignored.

Change-Id: Ic0fc5907074ee2a5ddfbbb1db2f1c8a6060cae9f
Related-Bug: #1240873
Merge "Dracut regenerate initrd w/ the right kernel"