NEW YORK (Reuters) - Oil prices were little changed after hitting 2019 highs on Tuesday, maintaining recent strength on the back of expectations for OPEC to continue production cuts. U.S. oil prices have climbed 9 percent in the last six weeks, as the supply cuts are now expected to continue through the rest of 2019. The Organization of the Petroleum Exporting Countries cancelled its April meeting this week after a shorter get-together in Azerbaijan.Some analysts expressed concern that the..