Fix test: bulk loading test ok locally

Bulk loading test with hbase installed locally passed. Here still are some issues we should fix later:
1 If i use HBaseshuffledrdd, the saved Hfile will be empty, that means no data written to Hfile
2 Hbase shell output for new loading data just like this(```\x00``` issue):
```
 row4\x00             column=cf1:a, timestamp=1415857127813, value=4            
 row4\x00             column=cf1:b, timestamp=1415857127813, value=8            
 row5\x00             column=cf1:a, timestamp=1415857127813, value=5            
 row5\x00             column=cf1:b, timestamp=1415857127813, value=10           
 row6\x00             column=cf1:a, timestamp=1415857127813, value=6            
 row6\x00             column=cf1:b, timestamp=1415857127813, value=12 
```
3 I try to make ```BulkLoadIntoTableIntSuite``` work, but failed. It said the mini cluster connection refused, but i write a test for mini cluster and it is ok, very weird.