Temporarily log the start and end of the Mongo unit tests.

We sometimes get MongoDB ConcurrentModificationException and I speculate
it's a bad interaction between two tests running at the same time. With
this logging in place, I at least have some hope of determining which
tests were running in parallel so I can start to form a theory.

lib-testing/src/main/resources/logback.xml

@@ -12,13 +12,13 @@
 
 	<!-- This emits warnings that matter in production but not in tests -->
 	<logger name="works.bosk.drivers.mongo.UninitializedCollectionException" level="ERROR"/>
+	<logger name="works.bosk.drivers.mongo.AbstractMongoDriverTest" level="INFO"/>
 
 	<!-- How to add more tracing during unit tests
 	<logger name="works.bosk.drivers.mongo" level="DEBUG"/>
 	<logger name="works.bosk.drivers.DriverConformanceTest" level="DEBUG"/>
 	<logger name="works.bosk.drivers.mongo.PandoFormatDriver" level="TRACE"/>
 	<logger name="works.bosk.drivers.mongo.MainDriver" level="TRACE"/>
-	<logger name="works.bosk.drivers.mongo.AbstractMongoDriverTest" level="INFO"/>
 	<logger name="works.bosk.drivers.mongo.BoskLogFilter" level="DEBUG"/>
 	 -->