Use config package to handle all controller configurations

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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

@@ -5,8 +5,13 @@ import (
 	"github.com/spf13/viper"
 )
 
+// BasePndUUID is an uuid for the base PND
 var BasePndUUID uuid.UUID
+
+// BaseSouthBoundType is the type of the base SBI
 var BaseSouthBoundType int32
+
+// BaseSouthBoundUUID is an uuid for the base SBI
 var BaseSouthBoundUUID uuid.UUID
 
 func getUUIDFromViper(viperKey string) (uuid.UUID, error) {