gRPC Java 1.7.0 released

[Penn (Dapeng) Zhang]

gRPC Java 1.7.0 is now released. Thank you for all your contributions. Full release notes:

Important Changes:

• Update protobuf to 3.4.0
• Update netty to 4.1.16

Features:

• Provide demos for manual flow-control and back-pressure
• OkHttp client supports setting GET method in headers
• Support client inbound gzipped streams
• io.grpc.Context now emits a SEVERE warning if it detects the length is abnormally long
• Record individual message sizes with Census/Tracing
• Allow to fallback to ServiceLoader.load without Classloader to make gRCP more OSGi friendly
• Minor memory reductions
• ManagedChannels log a warning when not properly shutdown

Bug Fixes:

• Fix Bazel naming/path-manipulation bug (#3379, #3483)
• Fix transport spuriously in notInUse state (#3374)
• We now wait until all streams are closed before terminating a Netty connection (#3386)

Incompatible Changes:

• User supplied values for reserved headers are stripped (“user-agent”, “content-type”, “te”)
• InprocessChannelBuilder and InprocessServerBuilder now throw an exception when using the static constructor inherited from their base class

[Carl Mastrangelo]

For the user provided headers like user-agent, note that this still works.   The specific change is that creating a custom header key and setting it will not work.   You can still set it on the Channel and the stub using the proper method call.