ceilometer compute agent not started correctly

command isn't properly parsed after switch to run_process. this
patch corrects the regression

Change-Id: Ib28d4bbf6f150854fc5aa04e3fa4eed92005ce19
Closes-Bug: #1370673
(cherry picked from commit bdeea69d726eca7a899b1d2225d213724b31df22)
Merge "ceilometer compute agent not started correctly" into stable/icehouse