Fix LTE X2 HO; code cleanup

DL IP flobased on nr-PHY over LTE RAN stack before merge with develop-nr.

Incomplete version before merge with new develop-nr

July 2019 Release -- X2 handover, CU/DU split (F1), CDRX, LTE-M

nFAPI bug fixes; X2 HO (TDD, forwarding, end marker) improvement; bug fixes for high UE load and power estimation on PUCCH

bugfixes: RF sim UE sync, multi-RRU and BladeRF compilation; support for multiRRU testing

Added simulated channel in RF sim; network control HO; fixes in T tracer and F1 CU init

Multi-RU support and OTA Synch/Calibration for TDD; UE side FeMBMS-EnTV; fixed rar_Hopping configuration for eMT; bugfix: fix RRC UE removal; CI improvements; Coverity Scan defect fixes

Support for LimeSuite v19.04.0 API; CoverityScan fixes

Support for LimeSuite v19.04.0 API

RRC Inactivity Timer testing, Remove deprecated build options, RRC: add an option to enable measurement reports, bugfix UE realtime bug

CDRX in FDD; fix for CU/DU; improved OAI-UE-USRP testing

nFAPI clean-up; MAC scheduler fixes; T tracer fixes; more tests on L2-nFAPI simulator, F1-CU/DU, OAI UE + USRP

Feature 127-F1-CU/DU; TDD fixes; new Thread Pool feature

eMTC testing; X2AP: timers and cleanup

X2; S1/noS1 clean up effort; typo fixes

Version working with PDCCH