patch 4.7.25.2
patch 4.7.25.2

[#16415] DB_ENV->lock_get may self deadlock if user defined locks are
used and there is only one lock partition defined.

hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB,hyc/BerkeleyDB