Tests

Tests #727

Job	Run time
Lint	18s
Check libraries	31s
Unit tests	2m 23s
Build charms / Get workflow version / Get workflow version	8s
Build charms / Collect charms	14s
Build charms / Build mongodb charm \| 22.04	4m 7s
Build charms / Build application charm \| 20.04	2m 39s
charm-integration	10m 3s
ha-integration	1h 18m 43s
relation-integration	23m 13s
legacy-integration	34m 14s
tls-integration	9m 33s
backup-integration	1h 8m 37s
metric-integration	19m 40s
	4h 14m 23s

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