Correct module names in batch examples

Author: kejacobson

examples/batch_no_limit/launch.py

@@ -1,6 +1,6 @@
 import os
-from pyrefine.pbs import PBS
-from pyrefine.pbs_batch import Job, PBSBatch
+from pbs4py.pbs import PBS
+from pbs4py.pbs_batch import Job, PBSBatch
 
 
 pbs = PBS.k3()

examples/dependency_chain/launch.py

@@ -1,4 +1,4 @@
-from pyrefine import PBS
+from pbs4py import PBS
 
 k3 = PBS.k3(time=1)
 k3.mem = '4gb'