[ONOS-3553] Resolve the onos-service not start issue
[ONOS-3553] Resolve the onos-service not start issue

This commit resolves onos-service not start issue.
If we have onos directory under /opt, no matter the directory
is empty or not, onos-service always tries to use this path.
If onos-service binary located in other path, we need to
reconfigure the ONOS_HOME.

Change-Id: I13f375d75e864240e6d014100fb7b69de7fd4178

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