Tests

Tests #792

Job	Run time
Unit tests	2m 40s
Lint	17s
Check libraries	30s
Build charms / Get workflow version / Get workflow version	3s
Build charms / Collect charms	19s
Build charms / Build mongodb charm \| 22.04	4m 21s
Build charms / Build application charm \| 20.04	2m 36s
charm-integration	14m 26s
ha-integration	1h 14m 2s
relation-integration	20m 48s
legacy-integration	7m 55s
tls-integration	24m 15s
backup-integration	1h 9m 19s
metric-integration	19m 32s
	4h 1m 3s

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