How do you suppress certain variables from being printed?

[sjlongland]

|ENVS| -> variable [gw.log.level] set, overwriting [info] with [new content..(secret)]
|ENVS| -> variable [gw.api.password] set, overwriting [aVerySecretPassword] with [new content..(secret)]
|ENVS| -> variable [gw.rt.source.scaninitinterval] set, overwriting [300000] with [new content..(secret)]
|ENVS| -> variable [gw.rt.source.scaninterval] set, overwriting [7200000] with [new content..(secret)]
|ENVS| -> variable [gw.rt.source.cleanupchecks] set, overwriting [3] with [new content..(secret)]
|ENVS| -> variable [gw.api.username] set, overwriting [user@example.com] with [new content..(secret)]
|ENVS| -> variable [gw.rt.source.cleanupdelay] set, overwriting [300000] with [new content..(secret)]

I really don't like having the system default credentials being printed on the console log every time my service starts up, how do I suppress this?