Merge pull request #7839 from markdroth/rename_client_config

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

gRPC-Core.podspec

grpc.gemspec

package.xml

src/core/ext/client_config/README.md

src/core/ext/client_config/client_channel.c

src/core/ext/client_config/lb_policy_factory.h

src/core/ext/client_config/resolver.c

src/core/ext/client_config/resolver.h

src/core/ext/client_config/resolver_factory.h

src/core/ext/client_config/resolver_result.c

src/core/ext/client_config/resolver_result.h

src/core/ext/resolver/dns/native/dns_resolver.c

src/core/ext/resolver/sockaddr/sockaddr_resolver.c

src/python/grpcio/grpc_core_dependencies.py