Corrected typo in metrics

Change-Id: If23292d83776be50f22f45c849fd45b7b04da7d9

etc/nova/nova.conf.sample

@@ -3030,7 +3030,7 @@
 
 # How the metrics are going to be weighed. This should be in
 # the form of "<name1>=<ratio1>, <name2>=<ratio2>, ...", where
-# <nameX> is one of the metric to be weighed, and <ratioX> is
+# <nameX> is one of the metrics to be weighed, and <ratioX> is
 # the corresponding ratio. So for "name1=1.0, name2=-1.0" The
 # final weight would be name1.value * 1.0 + name2.value *
 # -1.0. (list value)

nova/scheduler/weights/metrics.py

@@ -41,7 +41,7 @@ metrics_weight_opts = [
                     help='How the metrics are going to be weighed. This '
                          'should be in the form of "<name1>=<ratio1>, '
                          '<name2>=<ratio2>, ...", where <nameX> is one '
-                         'of the metric to be weighed, and <ratioX> is '
+                         'of the metrics to be weighed, and <ratioX> is '
                          'the corresponding ratio. So for "name1=1.0, '
                          'name2=-1.0" The final weight would be '
                          'name1.value * 1.0 + name2.value * -1.0.'),