Y. F. thanks the Russian Scientific Center at Kurchatov Institute and Joint Supercomputing Center of Russian Academy of Science for computational facilities. The work was supported in part by the Russian Science Foundation (Grant No 14-22-00093). Y. F. is grateful to the Ministry of Education and Science of Russian Federation (project MK-2099.2013.2) and to the grant of the Government of the Russian Federation 14.A12.31.0003 for the support
