fix "data.frame column not match" bug
fix "data.frame column not match" bug

We get a werid error message
"varibles xxx were specified with different types from the fit"

The problem is that the testing data.frame has different column names
from training data.frame

thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis,thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/urban-flow-analysis,thekingofkings/chicago-crime,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis