RPT-East European stocks coiled for catch-up, with Ukraine caveat

(Repeats, without changes, story first published on Tuesday) * East European stocks jumped 25 pct last time ECB did LTRO * Underperformance metrics have reached historic levels * East Europe performance gap http://link.reuters.com/bap82w * CEEU stocks LTRO reaction http://link.reuters.com/byq82w * East Europe P/Es vs EM http://link.reuters.com/zyn82w * EM 2014 FX performance http://link.reuters.com/jus35t By Marc Jones LONDON, Sept 16 (Reuters) - Eastern European