Improvements to stc command
Improvements to stc command

Add color for interactive sessions if stcColor is not set.
export ONOS_USE_SSH=true for stc tests and then reset it original value

Change-Id: I90d8c95efa91fbdeb97c3f33d601fef4d4bcb0f2

osinstom/onos,kkkane/ONOS,mengmoya/onos,kuujo/onos,sdnwiselab/onos,kuujo/onos,sdnwiselab/onos,y-higuchi/onos,castroflavio/onos,LorenzReinhart/ONOSnew,opennetworkinglab/onos,sonu283304/onos,VinodKumarS-Huawei/ietf96yang,castroflavio/onos,kkkane/ONOS,kuujo/onos,zsh2938/onos,maheshraju-Huawei/actn,VinodKumarS-Huawei/ietf96yang,gkatsikas/onos,sonu283304/onos,LorenzReinhart/ONOSnew,kuujo/onos,gkatsikas/onos,castroflavio/onos,donNewtonAlpha/onos,donNewtonAlpha/onos,LorenzReinhart/ONOSnew,Shashikanth-Huawei/bmp,donNewtonAlpha/onos,maheshraju-Huawei/actn,gkatsikas/onos,planoAccess/clonedONOS,oplinkoms/onos,maheshraju-Huawei/actn,maheshraju-Huawei/actn,LorenzReinhart/ONOSnew,opennetworkinglab/onos,mengmoya/onos,mengmoya/onos,zsh2938/onos,mengmoya/onos,mengmoya/onos,y-higuchi/onos,oplinkoms/onos,planoAccess/clonedONOS,sdnwiselab/onos,oplinkoms/onos,sdnwiselab/onos,kuujo/onos,LorenzReinhart/ONOSnew,sonu283304/onos,VinodKumarS-Huawei/ietf96yang,osinstom/onos,Shashikanth-Huawei/bmp,donNewtonAlpha/onos,kkkane/ONOS,oplinkoms/onos,planoAccess/clonedONOS,kuujo/onos,y-higuchi/onos,maheshraju-Huawei/actn,sdnwiselab/onos,gkatsikas/onos,VinodKumarS-Huawei/ietf96yang,lsinfo3/onos,lsinfo3/onos,osinstom/onos,zsh2938/onos,oplinkoms/onos,osinstom/onos,kuujo/onos,sonu283304/onos,osinstom/onos,gkatsikas/onos,sdnwiselab/onos,VinodKumarS-Huawei/ietf96yang,y-higuchi/onos,opennetworkinglab/onos,opennetworkinglab/onos,zsh2938/onos,opennetworkinglab/onos,oplinkoms/onos,gkatsikas/onos,kkkane/ONOS,y-higuchi/onos,Shashikanth-Huawei/bmp,castroflavio/onos,planoAccess/clonedONOS,lsinfo3/onos,lsinfo3/onos,opennetworkinglab/onos,donNewtonAlpha/onos,Shashikanth-Huawei/bmp,Shashikanth-Huawei/bmp,oplinkoms/onos