fix for reactor.spawnProcess sending deprecation warning

nova/process.py

@@ -151,6 +151,11 @@ def getProcessOutput(executable, args=None, env=None, path=None, reactor=None,
     d = defer.Deferred()
     p = BackRelayWithInput(
             d, startedDeferred=startedDeferred, error_ok=error_ok, input=input)
+    # VISH: commands come in as unicode, but self.executes needs
+    #       strings or process.spawn raises a deprecation warning
+    executable = str(executable)
+    if not args is None:
+        args = [str(x) for x in args]
     reactor.spawnProcess(p, executable, (executable,)+tuple(args), env, path)
     return d