Address package downgrade warnings

[mikeharder]

The latest build of UniverseCoherence\2.0.0-preview1 (24826) contains package downgrade warnings in this repo. All downgrade warnings are related to StackExchange.Redis.StrongName.

http://aspnetci/viewLog.html?buildId=214456&tab=buildResultsDiv&buildTypeId=UniverseCoherence

Detected package downgrade: System.IO.FileSystem from 4.3.0 to 4.0.1  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.IO.FileSystem (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.IO.FileSystem (>= 4.0.1) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
Detected package downgrade: System.Net.NameResolution from 4.3.0 to 4.0.0  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.Net.NameResolution (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.NameResolution (>= 4.0.0) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
Detected package downgrade: System.Net.Primitives from 4.3.0 to 4.0.11  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.Net.Primitives (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> System.Net.Primitives (>= 4.0.11) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
Detected package downgrade: System.IO.FileSystem from 4.3.0 to 4.0.1  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.IO.FileSystem (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.IO.FileSystem (>= 4.0.1) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
Detected package downgrade: System.Net.NameResolution from 4.3.0 to 4.0.0  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.Net.NameResolution (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.NameResolution (>= 4.0.0) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
Detected package downgrade: System.Net.Primitives from 4.3.0 to 4.0.11  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> runtime.win.System.Net.Sockets (>= 4.3.0) -> System.Net.Primitives (>= 4.3.0)  [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]
 Redis (>= 1.0.0) -> Microsoft.AspNetCore.DataProtection.Redis (>= 0.3.0-preview1-24766) -> StackExchange.Redis.StrongName (>= 1.1.605) -> System.Net.Sockets (>= 4.1.0) -> System.Net.Primitives (>= 4.0.11) [C:\b\w\590aeb6bc9b87cb8\.r\DataProtection\.build\KoreBuild.proj]