VOL-3588 Update OFAgent to support new version of protos

Change-Id: Ic3944779f9a600ebcd5d7a916616f473059e311e
diff --git a/vendor/github.com/opentracing/opentracing-go/go.sum b/vendor/github.com/opentracing/opentracing-go/go.sum
new file mode 100644
index 0000000..4347755
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/go.sum
@@ -0,0 +1,7 @@
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