Change "db" property string to use new constant
Change "db" property string to use new constant

brianfrankcooper/YCSB,leschekhomann/YCSB,madhurihn/YCSB_ToyDB,manolama/YCSB,jaemyoun/YCSB,leschekhomann/YCSB,jaemyoun/YCSB,zyguan/ycsb,manolama/YCSB,madhurihn/YCSB_ToyDB,jaemyoun/YCSB,leschekhomann/YCSB,zyguan/ycsb,brianfrankcooper/YCSB,zyguan/ycsb,ChristianNavolskyi/YCSB,brianfrankcooper/YCSB,jaemyoun/YCSB,ChristianNavolskyi/YCSB,cricket007/YCSB,leschekhomann/YCSB,cricket007/YCSB,ChristianNavolskyi/YCSB,cricket007/YCSB,cricket007/YCSB,madhurihn/YCSB_ToyDB,manolama/YCSB,brianfrankcooper/YCSB,zyguan/ycsb,manolama/YCSB,madhurihn/YCSB_ToyDB,ChristianNavolskyi/YCSB