Resolve "Applying a configuration with tls=true via configurationmanagement is impossible"

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.

Related to #389

controller/northbound/server/configurationmanagement.go

@@ -313,6 +313,7 @@ func (c ConfigurationManagementServer) createNetworkElements(sdnConfig *loadedSD
 			// TODO: change TransportOption - type is not needed; this should
 			// be removed as soon as we remove the csbi device type
 			Type: spb.Type_TYPE_OPENCONFIG,
+			Tls:  inputNetworkElement.TransportTLS,
 		}
 
 		plugin, err := c.pluginService.RequestPlugin(uuid.MustParse(inputNetworkElement.Plugin))