Tests

enable services to start on system start #750

Job	Run time
Check libraries	30s
Unit tests	2m 36s
Lint	17s
Build charms / Get workflow version / Get workflow version	4s
Build charms / Collect charms	13s
Build charms / Build mongodb charm \| 22.04	2m 6s
Build charms / Build application charm \| 20.04	1m 40s
charm-integration	11m 11s
ha-integration	8m 29s
relation-integration	14m 1s
legacy-integration	4m 11s
tls-integration	10m 32s
backup-integration	11m 40s
metric-integration	11m 2s
	1h 18m 32s

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