Bump down version to 2.2.8 #1230

Job	Run time
ci / molecule (3.11, 2.15, static_cluster)	4m 25s
ci / sanity (3.9, stable-2.15)	1m 16s
ci / molecule (3.11, 2.15, replication)	5m 26s
ci / molecule_current (3.11, default)	4m 58s
ci / sanity (3.11, stable-2.15)	1m 12s
ci / linter (3.11, 2.16)	54s
ci / molecule (3.11, 2.15, live_only)	4m 20s
ci / molecule_current (3.11, amq_upgrade)	8m 29s
ci / sanity (3.11, stable-2.16)	1m 11s
ci / molecule (3.11, 2.15, mirroring)	4m 33s
ci / sanity (3.12, milestone)	1m 0s
ci / molecule_current (3.11, custom_xml)	4m 48s
ci / molecule (3.11, 2.16, static_cluster)	4m 32s
ci / sanity (3.12, devel)	1m 6s
ci / molecule_current (3.11, federation)	8m 18s
ci / molecule (3.11, 2.16, replication)	5m 22s
ci / molecule_current (3.11, mask_passwords)	12m 4s
ci / molecule (3.11, 2.16, live_only)	3m 52s
ci / molecule_current (3.11, uninstall)	4m 30s
ci / molecule (3.11, 2.16, mirroring)	4m 31s
ci / molecule_next (3.11, default)	8m 19s
ci / molecule_next (3.11, amq_upgrade)	11m 11s
ci / molecule_next (3.11, custom_xml)	4m 44s
ci / molecule_next (3.11, federation)	5m 45s
ci / molecule_next (3.11, mask_passwords)	8m 13s
ci / molecule_next (3.11, uninstall)	4m 50s
	2h 9m 49s

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