Fixing issue with metro.py
Fixing issue with metro.py

- Each LINC switch should have separate dict instance for annotation.

Change-Id: Iad541c0107fd36ef9439d135e9215e9dae27ee9e

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