WIP: Update golang version to 1.7.1
WIP: Update golang version to 1.7.1

Signed-off-by: Jana Radhakrishnan <045898bda7d4800fe4909a9831e702ab79e266be@docker.com>

medallia/libnetwork,tmakita/libnetwork,WeiZhang555/libnetwork,ityangchen/libnetwork,curtiszimmerman/libnetwork,mahak/libnetwork,tmakita/libnetwork,mahak/libnetwork,allencloud/libnetwork,fcrisciani/libnetwork,docker/libnetwork,msabansal/libnetwork,allencloud/libnetwork,fcrisciani/libnetwork,kolyshkin/libnetwork,medallia/libnetwork,kolyshkin/libnetwork,vdemeester/libnetwork,ityangchen/libnetwork,docker/libnetwork,sainath14/libnetwork,vdemeester/libnetwork,abhi/libnetwork,abhi/libnetwork,WeiZhang555/libnetwork,mYmNeo/libnetwork,mahak/libnetwork,mYmNeo/libnetwork,mbanikazemi/libnetwork,curtiszimmerman/libnetwork,vdemeester/libnetwork,abhi/libnetwork,sainath14/libnetwork,docker/libnetwork,kolyshkin/libnetwork,mbanikazemi/libnetwork,medallia/libnetwork,msabansal/libnetwork