add test to reproduce https://github.com/jsk-ros-pkg/jsk_demos/issues/1286

[k-okada]

it is very strange, but if option string is long, it fails on planning

...
3. Running search
This is a unit task.
reading input... [t=0s]
Simplifying transitions... done!
done reading input! [t=0s]
building causal graph...done! [t=0s]
packing state variables...Variables: 7
Bytes per state: 4
done! [t=0s]
done initalizing global data [t=0s]
Peak memory: 4012 KB

Error:
parse error: 
missing ) at: 
list
Usage error occurred.

Exit code: 2

...

[ROSTEST]-----------------------------------------------------------------------

[pddl_planner.rosunit-sample_pddl_downward/sample_pddl_downward][passed]
[pddl_planner.rosunit-sample_pddl_downward_client/test_pddl_planner][passed]
[pddl_planner.rosunit-sample_pddl_downward_client_long_option/test_pddl_planner][FAILURE]
result sequence is 6
  File "/usr/lib/python2.7/unittest/case.py", line 329, in run
    testMethod()
  File "/home/k-okada/catkin_ws/ws_jsk_demos/src/jsk-ros-pkg/jsk_planning/pddl/pddl_planner/demos/sample-pddl/sample-client.py", line 86, in test_pddl_planner
    self.assertEquals(len(result.sequence), 6, "result sequence is 6")
  File "/usr/lib/python2.7/unittest/case.py", line 513, in assertEqual
    assertion_func(first, second, msg=msg)
  File "/usr/lib/python2.7/unittest/case.py", line 506, in _baseAssertEqual
    raise self.failureException(msg)
--------------------------------------------------------------------------------

[pddl_planner.rosunit-sample_pddl_ff/sample_pddl_ff][passed]
[pddl_planner.rosunit-sample_pddl_ff_client/test_pddl_planner][passed]
[pddl_planner.rosunit-sample_pddl_ffha/sample_pddl_ffha][passed]
[pddl_planner.rosunit-sample_pddl_ffha_client/test_pddl_planner][passed]

SUMMARY
 * RESULT: FAIL
 * TESTS: 7
 * ERRORS: 0
 * FAILURES: 1

[k-okada]

and not sure why, use shell=True solves....

diff --git a/pddl/pddl_planner/src/pddl.py b/pddl/pddl_planner/src/pddl.py
index f73b536..1002964 100755
--- a/pddl/pddl_planner/src/pddl.py
+++ b/pddl/pddl_planner/src/pddl.py
@@ -147,7 +147,7 @@ class PDDLPlannerActionServer(object):
         if max_planning_time > 0.0:
             command = ["timeout", str(max_planning_time)] + command
         rospy.loginfo("Command: %s" % " ".join(command))
-        proc = sp.Popen(command, stdout=sp.PIPE, stderr=sp.PIPE)
+        proc = sp.Popen(" ".join(command), stdout=sp.PIPE, stderr=sp.PIPE, shell=True)
         try:
             output, error = str(), str()
             r = rospy.Rate(10.0)