fix logic

Author: Vladimir Kotal

opengrok-tools/src/main/python/opengrok_tools/utils/command.py

@@ -386,13 +386,13 @@ def getretcode(self):
             return self.returncode
 
     def getoutputstr(self):
-        if self.state != Command.FINISHED:
+        if self.state == Command.FINISHED:
             return "".join(self.out).strip()
         else:
             return None
 
     def getoutput(self):
-        if self.state != Command.FINISHED:
+        if self.state == Command.FINISHED:
             return self.out
         else:
             return None