Enable slf4j output during helios-testing tests.
Enable slf4j output during helios-testing tests.

mavenraven/helios,mattnworb/helios,gtonic/helios,spotify/helios,mattnworb/helios,mavenraven/helios,gtonic/helios,spotify/helios,mavenraven/helios,spotify/helios,mattnworb/helios,gtonic/helios