Unify Netwonsoft.Json references

build/MSBuildToolset/project.json

 {
   "version": "1.0.0-*",
   "compilationOptions": {
-      "emitEntryPoint": true,
-      "outputName": "RoslynRestore"
-   },
-
+    "emitEntryPoint": true,
+    "outputName": "RoslynRestore"
+  },
   "dependencies": {
     "Microsoft.Build.Framework": "0.1.0-preview-00024-160610",
     "Microsoft.Build.Tasks.Core": "0.1.0-preview-00024-160610",
@@ -14,16 +13,18 @@
     "MSBuild": "0.1.0-preview-00024-160610",
     "Microsoft.NETCore.TestHost": "1.0.0",
     "Microsoft.NETCore.App": "1.0.0-rc3-004338",
-    "Newtonsoft.Json": "7.0.1"
+    "Newtonsoft.Json": "8.0.3"
   },
-
   "frameworks": {
     "NETCoreApp1.0": {
-      "imports": ["portable-net452", "dotnet"]
+      "imports": [
+        "portable-net452",
+        "dotnet"
+      ]
     }
   },
   "runtimes": {
-    "ubuntu.14.04-x64": { },
-    "osx.10.10-x64": { }
+    "ubuntu.14.04-x64": {},
+    "osx.10.10-x64": {}
   }
-}
+}
\ No newline at end of file

src/Tools/RepoUtil/RepoData.json

 {
     "fixedPackages": {
         "Microsoft.VisualStudio.Language.Intellisense": [ "14.3.25407", "15.0.25123-Dev15Preview" ],
-        "Newtonsoft.Json": [ "6.0.4", "7.0.1", "8.0.2", "9.0.1" ],
         "xunit.runner.console": [ "2.1.0", "2.2.0-beta1-build3239" ],
         "Microsoft.VSSDK.BuildTools": [ "14.3.25407", "15.0.25201-Dev15Preview2" ],
         "System.Reflection.Metadata": "1.0.21",

src/Tools/RepoUtil/project.json

-{
+{
   "supports": {},
   "dependencies": {
-    "Newtonsoft.Json": "9.0.1",
+    "Newtonsoft.Json": "8.0.3",
     "System.Collections.Immutable": "1.2.0"
   },
   "frameworks": {

src/Tools/SignRoslyn/project.json

-{
+{
   "supports": {},
   "dependencies": {
     "System.Collections.Immutable": "1.2.0",
     "System.Reflection.Metadata": "1.4.1-beta-24322-03",
-    "Newtonsoft.Json": "9.0.1"
+    "Newtonsoft.Json": "8.0.3"
   },
   "frameworks": {
     ".NETFramework,Version=v4.6": {}

src/Tools/Source/RunTests/project.json

 {
   "dependencies": { 
-    "Newtonsoft.Json": "8.0.2",
+    "Newtonsoft.Json": "8.0.3",
     "RestSharp": "105.2.3",
     "System.Collections.Immutable": "1.2.0",
     "System.Reflection.Metadata": "1.4.1-beta-24322-03",
   },
   "frameworks": {
-    "net46": { }
+    "net46": {}
   },
   "runtimes": {
-    "win7": { }
+    "win7": {}
   }
 }

src/VisualStudio/Setup.Next/project.json

 {
   "dependencies": {
     "StreamJsonRpc": "0.14.3-alpha",
-    "Newtonsoft.Json": "6.0.6",
     "Microsoft.VisualStudio.Threading": "14.1.131",
     "Microsoft.VisualStudio.Validation": "14.1.111",
-    "RoslynDependencies.Microsoft.Build.Desktop": "14.3.25407"
+    "RoslynDependencies.Microsoft.Build.Desktop": "14.3.25407",
+    "Newtonsoft.Json": "8.0.3"
   },
   "frameworks": {
-    "net46": { }
+    "net46": {}
   },
   "runtimes": {
-    "win7": { }
+    "win7": {}
   }
 }

src/Workspaces/Core/Portable/project.json

 {
   "dependencies": {
-    "Newtonsoft.Json": "6.0.4",
     "Microsoft.Composition": "1.0.27"
   },
   "frameworks": {