update travis commandline for testing.

Author: rainwoodman

.travis.yml

@@ -22,7 +22,7 @@ install:
 
 script: 
     - python ./runtests.py
-    - python ./runtests.py --mpirun -n 4 python -c 'import sys;sys.path.remove(""); import bigfile; bigfile.test()'
+    - python ./runtests.py --mpirun -n 4
     - bash check_tag.sh
 
 deploy: