FlexRAN: add control app delegation type in protobuf

openair2/ENB_APP/MESSAGES/V2/control_delegation.proto

@@ -3,4 +3,5 @@ package protocol;
 
 enum flex_control_delegation_type {
      FLCDT_MAC_DL_UE_SCHEDULER = 1;		// DL UE scheduler delegation
+     FLCDT_AGENT_CONTROL_APP = 2;               // Generic control application
 }

openair2/ENB_APP/MESSAGES/V2/flexran.proto

@@ -225,7 +225,7 @@ message flex_ue_state_change {
 
 message flex_control_delegation {
 	optional flex_header header = 1;
-	optional uint32 delegation_type = 2;	// Bitmap of FLCDT_* flags
+	optional flex_control_delegation_type delegation_type = 2;	// The delegated object type, decides about further processing
 	optional bytes payload = 3;	  	// Byte array of shared lib containing the delegated functions
 	optional string name = 4;		// The delegated functions names ordered based on bitmap flags
 }