Require grub2 instead of grub2-common #3502

Job	Run time
detect	1s
build-toolkit	1m 46s
build-matrix (orange) / detect	1s
build-matrix (orange) / build-os	2m 59s
build-matrix (blue) / detect	1s
build-matrix (blue) / build-os	2m 53s
build-matrix (green) / build-os	3m 16s
build-matrix (green) / detect	1s
build-matrix (blue) / build-iso	1m 52s
build-matrix (blue) / build-disk	4m 5s
build-matrix (orange) / build-disk	3m 16s
build-matrix (orange) / build-iso	2m 35s
build-matrix (green) / build-disk	3m 33s
build-matrix (green) / build-iso	1m 48s
build-matrix (blue) / test-installer	3m 22s
build-matrix (green) / test-installer	3m 45s
build-matrix (orange) / test-installer	4m 8s
build-matrix (orange) / tests-matrix (test-active)	3m 19s
build-matrix (green) / tests-matrix (test-upgrade)	8m 27s
build-matrix (green) / tests-matrix (test-downgrade)	6m 49s
build-matrix (green) / tests-matrix (test-recovery)	8m 26s
build-matrix (green) / tests-matrix (test-fallback)	9m 43s
build-matrix (green) / tests-matrix (test-fsck)	4m 35s
build-matrix (green) / tests-matrix (test-grubfallback)	5m 23s
build-matrix (blue) / tests-matrix (test-active)	3m 16s
	1h 29m 20s

Provide feedback