Merge pull request #2549 from hongweiwang/zookeeper

BUILD

Makefile

build.json

include/grpc/grpc.h

include/grpc/grpc_zookeeper.h

src/core/client_config/resolvers/zookeeper_resolver.c

src/core/client_config/resolvers/zookeeper_resolver.h

src/core/surface/init.c

templates/Makefile.template

test/build/zookeeper.c

test/cpp/end2end/zookeeper_test.cc

tools/jenkins/grpc_jenkins_slave/Dockerfile

tools/jenkins/grpc_jenkins_slave_32bits/Dockerfile

tools/jenkins/run_jenkins.sh

tools/run_tests/sources_and_headers.json

tools/run_tests/tests.json

vsprojects/Grpc.mak

vsprojects/grpc.sln

vsprojects/grpc_csharp_ext.sln