reset the verbosity level
reset the verbosity level


Former-commit-id: 1a191a13985713a6d0394daeaa6fbe0b85ee93aa
clab/dynet,danielhers/dynet,xunzhang/dynet,clab/dynet,chunyang-wen/dynet,shuheik/dynet,clab/dynet,shuheik/dynet,chunyang-wen/dynet,danielhers/dynet,danielhers/dynet,clab/dynet,danielhers/dynet,shuheik/dynet,chunyang-wen/dynet,shuheik/dynet,clab/cnn,clab/dynet,shuheik/dynet,danielhers/dynet,danielhers/dynet,danielhers/dynet,shuheik/dynet,clab/cnn,shuheik/dynet,chunyang-wen/dynet,clab/dynet,xunzhang/dynet,clab/cnn,xunzhang/dynet,xunzhang/dynet,clab/dynet