[tools] Remove tmpfs from malbec again and give it a try
malbec is running with tmpfs for a long time to avoid the HDD as a bottleneck. This however can cause problems if many "big" jobs are running the same time since it could saturate the RAM/tmpfs pretty quickly (therefore the inital bug, see blow). However we're also running qa-power8-5 for a long time from spinning-disks now and don't see major problems so the idea is to switch malbec back to have its pool-directories written on the build-in HDDs instead of tmpfs.
Guess this would mainly involve modifying salt (to remove tmpfs) and adjust malbec to mount its HDD instead (mkfs, fstab-entry).
Previous bug description¶
openQA test in scenario sle-12-SP4-Server-DVD-ppc64le-cryptlvm@ppc64le finished as Incomplete due to
"qemu-img: error while writing sector 17047168: No space left on device" while writing an image.