Resolving docker connection issue

See merge request aburger/openairinterface5g!42

additionally, added a config file for proxy connection.

MR !1179 : Fix Incorrect Array Size computation  
MR !1182 : CI NSA test fixes and enhancements  
MR !1169 : Dataplane bug in L2NFAPI_NOS1

This work is based on feedback from Thomas Schlichter.
His comments and suggestions were made just after the original MR was merged.
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

MR !1180: \[CI\] nsa traces 
-NSA test and pipeline update for UE-module
-improve traces and log collection (pcap, QLog, stats)
 
MR !1126: bugfix-nr-t-reordering 
-deal with "infinity" case for t-reordering
-some small fixes (one bug i pdcp, one log set to LOG_E in rlc)
 
MR !1168: nr-pdcp-small-bugfixes
-better nettle version detection
-bad HFN computation at PDU reception

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

MR !1171 : \[RHEL8\]\[CONTAINER\] Runtime check when creating pThreads  
MR !1172 : \[Docker\] adding OAI LTE RU target build in a container image  
MR !1174 : flexran-rtc repository is now public  
MR !1167 : fixing bugs in pucch ue functions

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

It looks like :
  - when running on a Fedora-host
  - with generic kernel
  - in a container
  - even in privileged mode

That is not enough and priority/schedule settings is not allowed.

So at runtime, we check and in case, we don't set up priorities.
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

This commit fixes a bug that makes the dataplane traffic of all the
emulated UEs to go through the interface of the first UE (oaitun_ue1).

The fix uses the last octet of the IP assigned to each UE to map it to its
UE_id, which is then used to get its RNTI and the correct PDCP queue.
For the emulator to work properly, the routing tables of the emulated UEs
must also be set. This patch introduces a script (setup_routes.sh) in
cmake_targets/tools that configures the routing tables. This script
must be run at the UE host machine once the UEs have successfully attached,
passing the number of emulated UEs as the argument. For example, in the
case of 16 emulated UEs, one must run "./setup_routes.sh 16".

This fix may fail to work.

we should stop supporting old versions of nettle at some point.