fix some minor issues detected by Codacy
fix some minor issues detected by Codacy

arlemi/node-red-node-watson,chughts/node-red-node-watson,arlemi/node-red-node-watson,chughts/node-red-node-watson,DanCunnington/node-red-node-watson,DanCunnington/node-red-node-watson,ylecleach/node-red-node-watson,ylecleach/node-red-node-watson