[VOL:3643] support of some OLT device metrics over the Device Management Interface
1. Following metrices are supported :
   METRIC_FAN_SPEED
   METRIC_CPU_USAGE_PERCENTAGE
   METRIC_RAM_USAGE_PERCENTAGE
   METRIC_DISK_USAGE_PERCENTAGE
   METRIC_INNER_SURROUNDING_TEMP
2. Following DMI APIs are implemented:
   ListMetrics
   UpdateMetricsConfiguration
   GetMetric
   SetMsgBusEndpoint
   GetMsgBusEndpoint
3. Updated docs/source/DMI_Server_README.md

Change-Id: I11f988ff972b8a8682012c7aeea88ba61afb82ba
diff --git a/go.sum b/go.sum
index 6adc8a6..9ed635a 100644
--- a/go.sum
+++ b/go.sum
@@ -31,11 +31,9 @@
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@@ -47,7 +45,6 @@
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@@ -90,8 +87,8 @@
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@@ -126,9 +123,7 @@
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@@ -142,7 +137,6 @@
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@@ -151,13 +145,11 @@
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@@ -176,7 +168,6 @@
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@@ -190,11 +181,8 @@
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