Update go.mod dependencies
--------------------------

go.mod
go.sum
vendor/modules.txt
------------------
  o Update voltha-lib-go to v7.4.5
  o Update voltha-protos to v5.4.11

vendor/
-------
  o Invoke make mod-update to refresh dependencies in vendor/ source.

Change-Id: Icf196fd23ddeaf3c203f116610b4acfc518cd474
diff --git a/go.sum b/go.sum
index eeffb76..671c85e 100644
--- a/go.sum
+++ b/go.sum
@@ -207,11 +207,10 @@
 github.com/onsi/gomega v1.14.0/go.mod h1:cIuvLEne0aoVhAgh/O6ac0Op8WWw9H6eYCriF+tEHG0=
 github.com/opencord/omci-lib-go/v2 v2.2.3 h1:cE9+67m8HmZmlET57eyQmqOOAJlfvvKrLgiJMiwhSMg=
 github.com/opencord/omci-lib-go/v2 v2.2.3/go.mod h1:o1S/jhDLHNikFU7uG2TR5UOM5KmKlqwLlVncXi0FBYQ=
-github.com/opencord/voltha-lib-go/v7 v7.4.5 h1:sN7k64/Fzlxx2P2vPA4o/nb4rYycNnCfgatEOKCcLeI=
-github.com/opencord/voltha-lib-go/v7 v7.4.5/go.mod h1:v+28v0RmwVkqO/ZSLqmJU9FHzV7srs/UaH8lCXkNoVQ=
-github.com/opencord/voltha-protos/v5 v5.4.6/go.mod h1:ZGcyW79kQKIo7AySo1LRu613E6uiozixrCF0yNB/4x8=
-github.com/opencord/voltha-protos/v5 v5.4.10 h1:Z2Y5Kunwume/IUde1ZxdsQ9vF8Q4miaEe9Oeag8vcKs=
-github.com/opencord/voltha-protos/v5 v5.4.10/go.mod h1:E/Jn3DNu8VGRBCgIWSSg4sWtTBiNuQGSFvHyNH1XlyM=
+github.com/opencord/voltha-lib-go/v7 v7.5.3 h1:pIw5056O8UocHyZcT77rh9YIoYo+f7E1cC3Yo+y57Ys=
+github.com/opencord/voltha-lib-go/v7 v7.5.3/go.mod h1:rlKcpoY1VJeM6WUA4d0DYeWddKTJ6AQSCiX0CLSv6rA=
+github.com/opencord/voltha-protos/v5 v5.4.11 h1:Q9j8yJO5HDf0D3jE8KmIgUWJjV4GIYgqiDEiPI3Zcmc=
+github.com/opencord/voltha-protos/v5 v5.4.11/go.mod h1:E/Jn3DNu8VGRBCgIWSSg4sWtTBiNuQGSFvHyNH1XlyM=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
 github.com/opentracing/opentracing-go v1.2.0 h1:uEJPy/1a5RIPAJ0Ov+OIO8OxWu77jEv+1B0VhjKrZUs=
 github.com/opentracing/opentracing-go v1.2.0/go.mod h1:GxEUsuufX4nBwe+T+Wl9TAgYrxe9dPLANfrWvHYVTgc=