WIP: Merging develop tag 2019.w51 to develop-nr

Merging the develop tag 2019.w51 into develop-nr branch

Mainly fMBMS on eNB side and CDRX improvements

Also contains cosmetics patches

And the final RFSIMULATION fixes from Laurent Thomas

openair2/RRC/LTE/MESSAGES/asn1c/ASN1_files/lte-rrc-15.6.0.asn1

@@ -126,7 +126,7 @@ DL-DCCH-MessageType ::= CHOICE {
 		loggedMeasurementConfiguration-r10		LoggedMeasurementConfiguration-r10,
 		rnReconfiguration-r10					RNReconfiguration-r10,
 		rrcConnectionResume-r13					RRCConnectionResume-r13,
-		spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL
+		spare3 NULL, spare2 NULL, spare1 NULL
 	},
 	messageClassExtension	SEQUENCE {}
 }