Don't spam the linux console with 'logging in as karaf' messages
Don't spam the linux console with 'logging in as karaf' messages

Fixes ONOS-4337

Change-Id: I1cd4b63706e5758a4f818f23904ebfd39d1d972b

VinodKumarS-Huawei/ietf96yang,VinodKumarS-Huawei/ietf96yang,donNewtonAlpha/onos,y-higuchi/onos,gkatsikas/onos,Shashikanth-Huawei/bmp,LorenzReinhart/ONOSnew,maheshraju-Huawei/actn,oplinkoms/onos,VinodKumarS-Huawei/ietf96yang,lsinfo3/onos,opennetworkinglab/onos,LorenzReinhart/ONOSnew,Shashikanth-Huawei/bmp,gkatsikas/onos,y-higuchi/onos,kuujo/onos,lsinfo3/onos,gkatsikas/onos,kuujo/onos,sdnwiselab/onos,kuujo/onos,mengmoya/onos,opennetworkinglab/onos,opennetworkinglab/onos,sdnwiselab/onos,LorenzReinhart/ONOSnew,Shashikanth-Huawei/bmp,gkatsikas/onos,sdnwiselab/onos,oplinkoms/onos,kuujo/onos,osinstom/onos,VinodKumarS-Huawei/ietf96yang,VinodKumarS-Huawei/ietf96yang,osinstom/onos,Shashikanth-Huawei/bmp,osinstom/onos,gkatsikas/onos,opennetworkinglab/onos,oplinkoms/onos,opennetworkinglab/onos,oplinkoms/onos,Shashikanth-Huawei/bmp,kuujo/onos,sdnwiselab/onos,donNewtonAlpha/onos,oplinkoms/onos,y-higuchi/onos,opennetworkinglab/onos,lsinfo3/onos,y-higuchi/onos,mengmoya/onos,LorenzReinhart/ONOSnew,donNewtonAlpha/onos,maheshraju-Huawei/actn,LorenzReinhart/ONOSnew,y-higuchi/onos,osinstom/onos,gkatsikas/onos,donNewtonAlpha/onos,mengmoya/onos,donNewtonAlpha/onos,osinstom/onos,mengmoya/onos,maheshraju-Huawei/actn,oplinkoms/onos,sdnwiselab/onos,maheshraju-Huawei/actn,kuujo/onos,kuujo/onos,maheshraju-Huawei/actn,mengmoya/onos,lsinfo3/onos,sdnwiselab/onos,oplinkoms/onos