This update provides:
1)  workaround around the build failures. In
summary, it forces the download of some packages during the build
process.
2) update the set of packages that should go inside the vendor
directory
3) Update the dockerfile to use go 1.10

Change-Id: I2bfd090ce0f25b0c10aa214755ae2da7e5384d60
diff --git a/vendor/github.com/soheilhy/cmux/CONTRIBUTORS b/vendor/github.com/soheilhy/cmux/CONTRIBUTORS
new file mode 100644
index 0000000..49878f2
--- /dev/null
+++ b/vendor/github.com/soheilhy/cmux/CONTRIBUTORS
@@ -0,0 +1,12 @@
+# The list of people who have contributed code to the cmux repository.
+#
+# Auto-generated with:
+#		git log --oneline --pretty=format:'%an <%aE>' | sort -u
+#
+Andreas Jaekle <andreas@jaekle.net>
+Dmitri Shuralyov <shurcooL@gmail.com>
+Ethan Mosbaugh <emosbaugh@gmail.com>
+Soheil Hassas Yeganeh <soheil.h.y@gmail.com>
+Soheil Hassas Yeganeh <soheil@cs.toronto.edu>
+Tamir Duberstein <tamir@cockroachlabs.com>
+Tamir Duberstein <tamird@gmail.com>