inclusion of popular Nordic ad sizes to default size list (prebid#1168)

inclusion of popularNordic ad sizes to default size list

Removed redundant 104 size and added size 32 instead

Fixed trailing comma

Author: Suren Silva

src/adapters/rubicon.js

@@ -27,6 +27,12 @@ var sizeMap = {
   15:'300x250',
   16:'336x280',
   19:'300x100',
+  31:'980x120',
+  32:'250x360',
+  33:'180x500',
+  35:'980x150',
+  37:'468x400',
+  38:'930x180',
   43:'320x50',
   44:'300x50',
   48:'300x300',
@@ -41,11 +47,15 @@ var sizeMap = {
   68:'1800x1000',
   72:'320x320',
   73:'320x160',
+  78:'980x240',
+  79:'980x300',
+  80:'980x400',
   83:'480x300',
   94:'970x310',
   96:'970x210',
   101:'480x320',
   102:'768x1024',
+  103:'480x280',
   113:'1000x300',
   117:'320x100',
   125:'800x250',