regenerate project files

vsprojects/cpptest.props

vsprojects/global.props

vsprojects/openssl.props

vsprojects/vcxproj/grpc/grpc.vcxproj

vsprojects/vcxproj/grpc/packages.config

vsprojects/vcxproj/grpc_csharp_ext/grpc_csharp_ext.vcxproj

vsprojects/vcxproj/test/alpn_test/alpn_test.vcxproj

...cxproj/test/async_end2end_test/async_end2end_test.vcxproj

...roperty_iterator_test/auth_property_iterator_test.vcxproj

...ts/vcxproj/test/bin_encoder_test/bin_encoder_test.vcxproj

...est/channel_arguments_test/channel_arguments_test.vcxproj

...ttp2_hpack_encoder_test/chttp2_hpack_encoder_test.vcxproj

...tus_conversion_test/chttp2_status_conversion_test.vcxproj

...est/chttp2_stream_map_test/chttp2_stream_map_test.vcxproj

vsprojects/vcxproj/test/cli_call_test/cli_call_test.vcxproj

...client_crash_test_server/client_crash_test_server.vcxproj

...ts/vcxproj/test/compression_test/compression_test.vcxproj

...bad_client_test/connection_prefix_bad_client_test.vcxproj

...ts/vcxproj/test/credentials_test/credentials_test.vcxproj

...oj/test/cxx_byte_buffer_test/cxx_byte_buffer_test.vcxproj