Develop Integration Branch : 2020 week 22

The following Merge Requests are been included:

* MR 796 : Nr rrc configuration trx thread
* MR 807 : Use SCF FAPI for DMRS and PTRS also on UE side
* MR 817 : Fixing errored/missing circular dependency protection
* MR 819 : cleanup branch and initial ninja build support
* MR 820 : CI: Add OAI-CN-In-Docker support