Merge pull request #2643 from guusdk/OF-2941_Snapshot-version-comparison #3510

Job	Run time
Build Openfire from source (17, zulu)	6m 29s
check_branch	1s
Check if database upgrade tests should be run	3s
Build Openfire from source (21, zulu)	6m 9s
Build (and maybe push) Docker image	9m 7s
Execute aioxmpp-based CI tests	1m 41s
Execute Smack-based CI tests	1m 3s
Generate DEB artifact	1m 3s
Execute Connectivity CI tests	30s
Test MySQL Upgrades	1m 3s
Test Postgres Upgrades	57s
Test SQL Server Upgrades	1m 20s
Check if Docker Hub secrets exist	1s
Publish to Maven	1m 56s
Publish to Docker Hub	0s
Test tagged images published to Docker Hub	0s
	31m 23s

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