Add step in publish process to push master branch as well.
Add step in publish process to push master branch as well.


Former-commit-id: f67e72819519232cd8c1c08a4f8cafb11b3637a6
rob-somerville/riak-dotnet-client,basho/riak-dotnet-client,rob-somerville/riak-dotnet-client,basho/riak-dotnet-client