[VOL-3318] : Framework for collecting Metrics from the ONU
- Currently implements collecting of OpticalPower Metrics and UNI status metrics
- Supports changing Metric collection frequency
- Use voltha-lib-go version 4.0.6

Change-Id: I9bd1ec8d8af9d739db96ae0303b6702dd3ce8520
diff --git a/go.sum b/go.sum
index cbfa3ff..93b5de6 100644
--- a/go.sum
+++ b/go.sum
@@ -219,8 +219,8 @@
 github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/opencord/omci-lib-go v0.13.4 h1:L3GpFHrx3DASixkCvztnJbcLGUTU/21wJYdE/qG9/XA=
 github.com/opencord/omci-lib-go v0.13.4/go.mod h1:6OIHB14Ch5qGgHzwSWlMACtk5KFoLzQ4LAhdcy4jwvo=
-github.com/opencord/voltha-lib-go/v4 v4.0.5 h1:tIJHjIxIExwCEvlY7wnSqERnoaDn7uOaQgL9t3SKvQQ=
-github.com/opencord/voltha-lib-go/v4 v4.0.5/go.mod h1:8NFUZz/mp4OvRmilBRhkLOUrw4G01ruSAVdzQu2ivPc=
+github.com/opencord/voltha-lib-go/v4 v4.0.6 h1:Mc/bkYDR3YcpWPeW35ju9h3sO2cGByz8XM0ik5ikJkc=
+github.com/opencord/voltha-lib-go/v4 v4.0.6/go.mod h1:8NFUZz/mp4OvRmilBRhkLOUrw4G01ruSAVdzQu2ivPc=
 github.com/opencord/voltha-protos/v4 v4.0.8 h1:/P9IYuWPTp/aabS5n1fakQgHCFNzKjW1JHw3TOLAfKE=
 github.com/opencord/voltha-protos/v4 v4.0.8/go.mod h1:W/OIFIyvFh/C0vchRUuarIsMylEhzCRM9pNxLvkPtKc=
 github.com/opentracing/opentracing-go v1.1.0 h1:pWlfV3Bxv7k65HYwkikxat0+s3pV4bsqf19k25Ur8rU=