Improve code coverage #313

Job	Run time
Pharo64-10 + app-config	37s
Pharo64-10 + app-control	35s
Pharo64-10 + app-info	31s
Pharo64-10 + core	31s
Pharo64-10 + dependent-sunit-extensions	35s
Pharo64-10 + deployment	48s
Pharo64-10 + development	42s
Pharo64-10 + examples	34s
Pharo64-10 + healthcheck	34s
Pharo64-10 + json-rpc	32s
Pharo64-10 + loggers	33s
Pharo64-10 + metrics	31s
Pharo64-10 + metrics-http	33s
Pharo64-10 + tests	46s
Pharo64-10 + tools	35s
Pharo64-11 + app-config	32s
Pharo64-11 + app-control	30s
Pharo64-11 + app-info	28s
Pharo64-11 + core	30s
Pharo64-11 + dependent-sunit-extensions	41s
Pharo64-11 + deployment	48s
Pharo64-11 + development	39s
Pharo64-11 + examples	51s
Pharo64-11 + healthcheck	29s
Pharo64-11 + json-rpc	35s
Pharo64-11 + loggers	32s
Pharo64-11 + metrics	29s
Pharo64-11 + metrics-http	40s
Pharo64-11 + tests	52s
Pharo64-11 + tools	15s
	17m 48s

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