GLOBAL MARKETS-Shares cautious on Ukraine anxiety; China, India lead gains

* Markets focus on reaction to east Ukraine referendum * China shares up on capital market reform hopes * Mumbai shares up ahead of elections * Oil rises on Ukraine concerns * Euro under pressure after ECB comments By Marc Jones LONDON, May 12 (Reuters) - Shares advanced cautiously on Monday as investors braced for a possible escalation in Ukraine's civil conflict after anti-Kiev rebels declared victory in a referendum on self-rule. Hopes of capital market reform bo