Merge pull request #7584 from nicolasnoble/manual-upmerge

...les/objective-c/auth_sample/Misc/GoogleService-Info.plist

src/compiler/ruby_generator_helpers-inl.h

src/csharp/.nuget/packages.config

src/csharp/Grpc.Core.Tests/packages.config

src/csharp/Grpc.Core.Tests/project.json

src/csharp/Grpc.Examples.MathClient/packages.config

src/csharp/Grpc.Examples.MathServer/packages.config

src/csharp/Grpc.IntegrationTesting.QpsWorker/packages.config

...harp/Grpc.IntegrationTesting.StressClient/packages.config

src/node/ext/call_credentials.cc

src/node/health_check/package.json

src/node/src/credentials.js

src/ruby/.rubocop.yml

src/ruby/bin/math_client.rb

src/ruby/bin/math_pb.rb

src/ruby/bin/math_server.rb

src/ruby/bin/math_services_pb.rb

src/ruby/pb/grpc/health/checker.rb

src/ruby/pb/grpc/health/v1/health_pb.rb

src/ruby/pb/grpc/health/v1/health_services_pb.rb