[style] pep8 and other small style fixes

Remove unused import, commas at the end of dictionaries.

bin/daemon

 #!/usr/bin/env python2
 
-from __future__ import print_function
 import nrm
 import nrm.daemon
 

nrm/aci.py

@@ -57,7 +57,7 @@ class Scheduler(SpecField):
     classes = ['SCHED_FIFO', 'SCHED_HPC', 'SCHED_OTHER']
 
     fields = {"policy": spec(unicode, True),
-              "priority": spec(unicode, False)
+              "priority": spec(unicode, False),
               }
 
     def __init__(self):
@@ -180,7 +180,7 @@ class ImageManifest(SpecField):
     fields = {"acKind": spec(unicode, True),
               "acVersion": spec(unicode, True),
               "name": spec(unicode, True),
-              "app": spec(App, True)
+              "app": spec(App, True),
               }
 
     def __init__(self):