UPDATE 2-Barclays to sell UAE retail ops to Abu Dhabi Islamic Bank for $177 mln
* ADIB says deal will give it 110,000 customers * Will allow it to expand into serving expat customers * But some high-end customers likely to be reluctant to shift * ADIB shares ease slightly but up 54 pct year-to-date * Barclays to focus on corporate, investment banking,
