bad conflict merge inadvertently broke package

reverting the change to the websites package in the tests project.

Author: begoldsm

src/ResourceManager/Websites/Commands.Websites.Test/packages.config

@@ -7,7 +7,7 @@
   <package id="Microsoft.Azure.Gallery" version="2.6.2-preview" targetFramework="net45" />
   <package id="Microsoft.Azure.Management.Authorization" version="1.0.2" targetFramework="net45" />
   <package id="Microsoft.Azure.Management.Resources" version="2.18.11-preview" targetFramework="net45" />
-  <package id="Microsoft.Azure.Management.WebSites" version="0.16.7-prerelease" targetFramework="net45" />
+  <package id="Microsoft.Azure.Management.WebSites" version="0.16.7-preview" targetFramework="net45" />
   <package id="Microsoft.Azure.Test.Framework" version="1.0.5785.18045-prerelease" targetFramework="net45" />
   <package id="Microsoft.Azure.Test.HttpRecorder" version="1.0.5785.18045-prerelease" targetFramework="net45" />
   <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />