VOL-1900 lint warning fixes ro_core

Change-Id: I5ce82f2d188d215ba9620d0923a1101ed4e5e4a8
diff --git a/ro_core/core/core.go b/ro_core/core/core.go
index 797c05a..da9fead 100644
--- a/ro_core/core/core.go
+++ b/ro_core/core/core.go
@@ -13,10 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package core
 
 import (
 	"context"
+
+	"time"
+
 	"github.com/opencord/voltha-go/db/model"
 	"github.com/opencord/voltha-go/ro_core/config"
 	"github.com/opencord/voltha-lib-go/v2/pkg/db"
@@ -28,11 +32,11 @@
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
-	"time"
 )
 
+// Core holds all information of read only core service
 type Core struct {
-	instanceId        string
+	instanceID        string
 	genericMgr        *ModelProxyManager
 	deviceMgr         *DeviceManager
 	logicalDeviceMgr  *LogicalDeviceManager
@@ -49,12 +53,16 @@
 }
 
 func init() {
-	log.AddPackage(log.JSON, log.DebugLevel, nil)
+	_, err := log.AddPackage(log.JSON, log.DebugLevel, nil)
+	if err != nil {
+		log.Errorw("unable-to-register-package-to-the-log-map", log.Fields{"error": err})
+	}
 }
 
+// NewCore instantiates core service parameters
 func NewCore(id string, cf *config.ROCoreFlags, kvClient kvstore.Client) *Core {
 	var core Core
-	core.instanceId = id
+	core.instanceID = id
 	core.exitChannel = make(chan int, 1)
 	core.config = cf
 	core.kvClient = kvClient
@@ -101,7 +109,7 @@
 					return status.Error(codes.Unavailable, "kv store unreachable")
 				}
 			}
-			count += 1
+			count++
 			//      Take a nap before retrying
 			time.Sleep(retryInterval)
 			log.Infow("retry-KV-store-connectivity", log.Fields{"retryCount": count, "maxRetries": maxRetries, "retryInterval": retryInterval})
@@ -114,8 +122,9 @@
 	return nil
 }
 
+// Start will start core adapter services
 func (core *Core) Start(ctx context.Context) {
-	log.Info("starting-adaptercore", log.Fields{"coreId": core.instanceId})
+	log.Info("starting-adaptercore", log.Fields{"coreId": core.instanceID})
 
 	// Wait until connection to KV Store is up
 	if err := core.waitUntilKVStoreReachableOrMaxTries(ctx, core.config.MaxConnectionRetries, core.config.ConnectionRetryInterval); err != nil {
@@ -125,7 +134,7 @@
 	probe.UpdateStatusFromContext(ctx, "kv-store", probe.ServiceStatusRunning)
 
 	core.genericMgr = newModelProxyManager(core.clusterDataProxy)
-	core.deviceMgr = newDeviceManager(core.clusterDataProxy, core.instanceId)
+	core.deviceMgr = newDeviceManager(core.clusterDataProxy, core.instanceID)
 	core.logicalDeviceMgr = newLogicalDeviceManager(core.deviceMgr, core.clusterDataProxy)
 	go core.startDeviceManager(ctx)
 	go core.startLogicalDeviceManager(ctx)
@@ -135,6 +144,7 @@
 	log.Info("adaptercore-started")
 }
 
+// Stop will stop core services
 func (core *Core) Stop(ctx context.Context) {
 	log.Info("stopping-adaptercore")
 	if core.exitChannel != nil {