Allow decimals to be specificed to limit decimals graphs

This allows graphs tool tips to be limited by a decimal count.
Also fix forgotten validation on decimals setting specific to legends.

Change-Id: I5840b0081dbb17ead0c49fa7d6d6ba1a2e82bb7c

grafana_dashboards/schema/panel/graph.py

@@ -83,7 +83,7 @@ class Graph(Base):
         )
         yaxes_format = [
             {
-                v.Optional('decimals'): int,
+                v.Optional('decimals'): v.All(int),
                 v.Optional('format', default='short'): y_format,
                 v.Optional('label', default=''): v.All(str),
                 v.Optional('logBase', default=1): v.All(int, v.Range(min=1)),
@@ -137,6 +137,7 @@ class Graph(Base):
         graph = {
             v.Required('bars', default=False): v.All(bool),
             v.Optional('datasource'): v.All(str),
+            v.Optional('decimals'): v.All(int),
             v.Required('fill', default=1): v.All(int),
             v.Optional('hideTimeOverride'): v.All(bool),
             v.Optional('leftYAxisLabel'): v.All(str, v.Length(min=1)),

tests/schema/fixtures/dashboard-0025.json

@@ -9,6 +9,7 @@
                     "panels": [
                         {
                             "bars": false,
+                            "decimals": 2,
                             "editable": true,
                             "error": false,
                             "fill": 1,

tests/schema/fixtures/dashboard-0025.yaml

@@ -6,6 +6,7 @@ dashboard:
       panels:
           - title: no title (click here)
             type: graph
+            decimals: 2
             leftYAxisLabel: left label
             rightYAxisLabel: right label
             yaxes: