Reverting version from 2.1.2 back to 2.1.1

As a result of changing the way we apply servicing updates to aspnet core, this repo did not need the version bump because there are no planned product changes in this repo.

Author: Nate McMaster

version.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <VersionPrefix>2.1.2</VersionPrefix>
+    <VersionPrefix>2.1.1</VersionPrefix>
     <VersionSuffix>rtm</VersionSuffix>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' == 'rtm' ">$(VersionPrefix)</PackageVersion>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' != 'rtm' ">$(VersionPrefix)-$(VersionSuffix)-final</PackageVersion>