Update API tutorials to v 1.5 (dotnet#829)

* Updated image classification to 1.5

* Updated bike demand forecasting to 1.5

Author: luisquintanilla

samples/csharp/getting-started/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification_Binary.csproj

@@ -6,10 +6,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="Microsoft.ML" Version="1.5.0" />
+    <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="1.5.0" />
+    <PackageReference Include="Microsoft.ML.Vision" Version="1.5.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.2.0.2" />
   </ItemGroup>
 
   <ItemGroup>

samples/csharp/getting-started/Forecasting_BikeSharingDemand/BikeDemandForecasting/BikeDemandForecasting.csproj

@@ -6,9 +6,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="Microsoft.ML.TimeSeries" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="System.Data.SqlClient" Version="4.7.0" />
+    <PackageReference Include="Microsoft.ML" Version="1.5.0" />
+    <PackageReference Include="Microsoft.ML.TimeSeries" Version="1.5.0" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.8.1" />
   </ItemGroup>
 
 </Project>