LONDON (Reuters) – Tough Western sanctions on Russia and rhetoric from Moscow have raised doubts about whether the Russian government and the country’s companies will continue to make payments on their bonds in the coming days, or default on them instead. The last time the Russian government defaulted was in 1998 when the combination of heavy government spending, the Asian financial crisis and a sharp drop in oil and metals prices – Russia’s key revenue earners – caused a currency turmoil. Below are four upcoming bond payments to watch. 1) Telecoms firm VEON, formerly known as VimpelCOM has a …