Updated GSF.Web.SecurityModule for extensibility.
Updated GSF.Web.SecurityModule for extensibility.

git-tfs-id: [https://tfs.codeplex.com/tfs/TFS07]$/gsf/Main;C92628

rmc00/gsf,GridProtectionAlliance/gsf,GridProtectionAlliance/gsf,GridProtectionAlliance/gsf,GridProtectionAlliance/gsf,GridProtectionAlliance/gsf,rmc00/gsf,rmc00/gsf,rmc00/gsf,GridProtectionAlliance/gsf,rmc00/gsf,GridProtectionAlliance/gsf,rmc00/gsf,rmc00/gsf,GridProtectionAlliance/gsf