[Authentication] Added log for token validation error

Authentication/Authentication.csproj

     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Logs, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\Logs.dll.1.2.5\lib\net45\Logs.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.Practices.EnterpriseLibrary.Common, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\EnterpriseLibrary.Common.6.0.1304.0\lib\NET45\Microsoft.Practices.EnterpriseLibrary.Common.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.Practices.EnterpriseLibrary.Data, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\EnterpriseLibrary.Data.6.0.1304.0\lib\NET45\Microsoft.Practices.EnterpriseLibrary.Data.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.Practices.EnterpriseLibrary.Logging, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\EnterpriseLibrary.Logging.6.0.1304.0\lib\NET45\Microsoft.Practices.EnterpriseLibrary.Logging.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\EnterpriseLibrary.Logging.Database.6.0.1304.0\lib\NET45\Microsoft.Practices.EnterpriseLibrary.Logging.Database.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="Newtonsoft.Json, Version=6.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\Newtonsoft.Json.6.0.8\lib\net45\Newtonsoft.Json.dll</HintPath>

Authentication/Business/JWT/TokenValidationHandler.cs

 using System.Threading;
 using System.Threading.Tasks;
 using iiie.Authentication.DBO;
+using iiie.Logs.DataAccess;
+using iiie.Logs.DBO;
 
 namespace iiie.Authentication.Business.JWT
 {
             }
             catch (Exception e)
             {
+                OpResult<bool>.Error(ResultStatus.LoginError, e).Log();
                 statusCode = HttpStatusCode.Unauthorized;
             }
             return Task<HttpResponseMessage>.Factory.StartNew(() =>

Authentication/packages.config

 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="EnterpriseLibrary.Common" version="6.0.1304.0" targetFramework="net45" />
+  <package id="EnterpriseLibrary.Data" version="6.0.1304.0" targetFramework="net45" />
+  <package id="EnterpriseLibrary.Logging" version="6.0.1304.0" targetFramework="net45" />
+  <package id="EnterpriseLibrary.Logging.Database" version="6.0.1304.0" targetFramework="net45" />
+  <package id="Logs.dll" version="1.2.5" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net45" />