By Philip Blenkinsop and Marine Strauss BRUSSELS (Reuters) -EU leaders bickered on Friday over steps to ease the energy market crunch exacerbated by Russia’s invasion of Ukraine, but managed to present a united front amid mounting concern over the impact on hard-hit consumers of soaring gas and oil prices. An intense debate on whether to cap energy prices, which pitted some of the European Union’s southern countries against Germany and the Netherlands, spun the second day of an EU summit well into the evening and ended with a trade-off deal. At one point Spanish Prime Minister Pedro Sanchez le…