The%20Indian%20retail%20space%20is%20an%20interesting%20play%20between%20Indian%20and%20foreign%20retailers%2C%20and%20is%20turning%20out%20to%20be%20one%20of%20those%20unexpected%20marriages.%20Those%20who%20were%20once%20rivals%20are%20now%20bedfellows%20as%20each%20one%20eyes%20the%20Indian%20retail%20pie%20that%2C%20according%20to%20global%20consulting%20firm%20E%26Y%2C%20is%20valued%20at%20%24650%20billion%2C%20and%20is%20growing%20close%20to%2010%20percent%20each%20year.