FIX: make exception explicit

Author: mgxd

nipype/pipeline/plugins/slurm.py

@@ -69,7 +69,7 @@ def _is_pending(self, taskid):
                 resource_monitor=False,
                 terminal_output='allatonce').run()
             return res.runtime.stdout.find(str(taskid)) > -1
-        except Exception as e:
+        except RuntimeError as e:
             if 'Invalid job id' not in str(e):
                 raise(e)
             return False