set jaeger-client-go source path and updates vendor

Author: Anthony Woods

Gopkg.lock

@@ -135,6 +135,11 @@
 
 [[constraint]]
   name = "github.com/uber/jaeger-client-go"
+  source = "https://github.com/jaegertracing/jaeger-client-go.git"
+
+[[override]]
+  name = "github.com/uber/jaeger-lib"
+  source = "https://github.com/jaegertracing/jaeger-lib.git"
 
 [[constraint]]
   name = "gopkg.in/macaron.v1"