Use config package to handle all controller configurations

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

config/config.go

@@ -9,6 +9,13 @@ import (
 	"github.com/spf13/viper"
 )
 
+const (
+	defaultTimeOutDuration10minutes = "10m"
+	basePNDUUIDKey                  = "basePNDUUID"
+	baseSouthBoundTypeKey           = "baseSouthBoundType"
+	baseSouthBoundUUIDKey           = "baseSouthBoundUUID"
+)
+
 // BasePndUUID is an uuid for the base PND
 var BasePndUUID uuid.UUID
 
@@ -52,32 +59,25 @@ func Init() {
 	InitializeConfig()
 }
 
-func getFromEnv(key string) string {
-	return ""
-}
-
 // InitializeConfig loads the configuration
 func InitializeConfig() error {
 	var err error
-	basePNDUUIDKey := "basePNDUUID"
-	baseSouthBoundTypeKey := "baseSouthBoundType"
-	baseSouthBoundUUIDKey := "baseSouthBoundUUID"
 
-	basePNDUUID, err := getUUIDFromViper(basePNDUUIDKey)
+	basePNDUUIDFromViper, err := getUUIDFromViper(basePNDUUIDKey)
 	if err != nil {
 		return err
 	}
 
-	BasePndUUID = basePNDUUID
+	BasePndUUID = basePNDUUIDFromViper
 
-	baseSouthBoundUUID, err := getUUIDFromViper(baseSouthBoundUUIDKey)
+	baseSouthBoundUUIDFromViper, err := getUUIDFromViper(baseSouthBoundUUIDKey)
 	if err != nil {
 		return err
 	}
 
-	BaseSouthBoundUUID = baseSouthBoundUUID
+	BaseSouthBoundUUID = baseSouthBoundUUIDFromViper
 
-	BaseSouthBoundType = viper.GetInt32("BaseSouthBoundType")
+	BaseSouthBoundType = viper.GetInt32(baseSouthBoundTypeKey)
 	if BaseSouthBoundType != 0 {
 		viper.Set(baseSouthBoundTypeKey, 0)
 		viper.WriteConfig()
@@ -90,7 +90,7 @@ func InitializeConfig() error {
 			return err
 		}
 	} else {
-		ChangeTimeout, err = time.ParseDuration("10m")
+		ChangeTimeout, err = time.ParseDuration(defaultTimeOutDuration10minutes)
 		if err != nil {
 			return err
 		}