Merge branch 'develop_integration_2019_w30' into 'develop'

See merge request oai/openairinterface5g!649

Develop: Integration 2019 Week 30
Master Branch Release v1.1 Candidate

The following Merge Requests are included:

* MR 630 : nfapi interface bug fixes
* MR 638 : X2 HO (tdd, forwarding, end marker)
* MR 646 : Loadtester bugfixes
* MR 647 : fix power estimation
* MR 648 : CI: X2 Handover Testing