removed offending mapkeeper module so that maven will build
removed offending mapkeeper module so that maven will build

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