Try to limit MKL and OpenMP to 1 thread

.travis.yml

@@ -69,6 +69,8 @@ matrix:
 
 script:
   - export THEANO_FLAGS=$THEANO_FLAGS,warn.ignore_bug_before=all,on_opt_error=raise,on_shape_error=raise,gcc.cxxflags=-pipe
+  - export MKL_NUM_THREADS=1
+  - export OMP_NUM_THREADS=1
   - python --version
   - uname -a
   - free -m