Use orb @dev:alpha #542

Job	Run time
Build Openfire from source (11, zulu)	18m 39s
check_branch	0s
Build Openfire from source (17, zulu)	18m 26s
Check if database upgrade tests should be run	0s
Execute Connectivity CI tests	6h 0m 13s
Execute aioxmpp-based CI tests	6h 0m 23s
Test MySQL Upgrades	0s
Test Postgres Upgrades	0s
Execute Smack-based CI tests	6h 0m 13s
Test SQL Server Upgrades	0s
Publish to Maven	0s
Check if Docker Hub secrets exist	0s
Publish to Docker Hub	0s
Test tagged images published to Docker Hub	0s
	18h 37m 54s

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