Tests

Tests #928

Job	Run time
Check libraries	29s
Lint	14s
Unit tests	2m 36s
Build charms / Get workflow version / Get workflow version	3s
Build charms / Collect charms	19s
Build charms / Build mongodb charm \| 22.04	4m 3s
Build charms / Build application charm \| 20.04	2m 52s
charm-integration	14m 43s
ha-integration	1h 40m 20s
relation-integration	26m 9s
legacy-integration	6m 53s
tls-integration	24m 37s
backup-integration	1h 9m 43s
metric-integration	19m 55s
	4h 32m 56s

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