berlin german chancellor angela merkel appoint jan hecker refugee policy coordinator new foreign policy adviser brace tricky talk new coalition government next week immigration likely key issue government spokeswoman say merkel humble last month national election surge anti-immigrant far right seek put together three-way coalition conservatives pro-business free democrats environmentalist green combination previously untested federal level members conservative bloc resolve differences agree limit migration monday pave way talk begin party hecker former federal judge take newly create position refugee coordinator october 2015 merkel decision allow million migrants lead germany migration treaties african state accompany merkel number foreign trip focus migration decision reflect grow awareness refugee asylum policies inextricably link security issue say judy dempsey senior fellow carnegie europe overview libya traffickers security border agreement turkey say hecker replace christoph heusgen advise merkel 12 years role chancellor become germany u.n. ambassador new york late july hecker appointment merkel break second time longstanding tradition tap diplomats fill foreign political job chancellery merkel name refugee expert foreign policy adviser