Fix rubocop warning
Fix rubocop warning

[#142635287]

degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,cloudfoundry-community/asp.net5-buildpack,degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,degrim/asp.net5-buildpack