jigasi: fix Sentry test

It's set to 0 by default, cast it to boolean to be sure, just like we do for the other containers.

jigasi/rootfs/defaults/logging.properties

@@ -1,4 +1,4 @@
-{{ if .Env.SENTRY_DSN }}
+{{ if .Env.SENTRY_DSN | default "0" | toBool }}
 handlers=java.util.logging.ConsoleHandler,io.sentry.jul.SentryHandler
 {{ else }}
 handlers=java.util.logging.ConsoleHandler