VOL-4028: Support fetching Onu PON Optical Information via SingleGetValueReq/Resp

Change-Id: I395aef64ee54ff75f172ac418ba73fcccd800f4f
diff --git a/go.sum b/go.sum
index 16e805f..96a9944 100644
--- a/go.sum
+++ b/go.sum
@@ -160,8 +160,9 @@
 github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/opencord/voltha-lib-go/v4 v4.3.0 h1:yJ/qhUhBqBCYjR7aik6ON9g+8vQUssGTDvKAdphX4FM=
 github.com/opencord/voltha-lib-go/v4 v4.3.0/go.mod h1:65GN71j4os0ApBRR+xbJ93iAMJMKIwVi/npG/hbPt8w=
-github.com/opencord/voltha-protos/v4 v4.1.1 h1:yovQHC+JQSrw5zxj0UeQqmyFUBQ+487JdG5w5ttrRyc=
 github.com/opencord/voltha-protos/v4 v4.1.1/go.mod h1:W/OIFIyvFh/C0vchRUuarIsMylEhzCRM9pNxLvkPtKc=
+github.com/opencord/voltha-protos/v4 v4.1.4 h1:mpE4y7zRmoEXMX4seurWBWQ97u2a4rAf8gY2qONjz8I=
+github.com/opencord/voltha-protos/v4 v4.1.4/go.mod h1:W/OIFIyvFh/C0vchRUuarIsMylEhzCRM9pNxLvkPtKc=
 github.com/opentracing/opentracing-go v1.1.0 h1:pWlfV3Bxv7k65HYwkikxat0+s3pV4bsqf19k25Ur8rU=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
 github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=