Changes to make OAI blueprint to work in simulation and w/ USRP to connect physical UEs

[gab-arrobo]

Simulation has been tested in a 2-server configuration

TASK [uEsimulator : debug] *********************************************************************************************
ok: [node2] => {
    "uEsimPingOutput.stdout_lines": [
        "PING 192.168.250.1 (192.168.250.1) from 172.250.0.4 oaitun_ue1: 56(84) bytes of data.",
        "64 bytes from 192.168.250.1: icmp_seq=1 ttl=64 time=14.1 ms",
        "64 bytes from 192.168.250.1: icmp_seq=2 ttl=64 time=8.31 ms",
        "64 bytes from 192.168.250.1: icmp_seq=3 ttl=64 time=12.9 ms",
        "64 bytes from 192.168.250.1: icmp_seq=4 ttl=64 time=12.5 ms",
        "64 bytes from 192.168.250.1: icmp_seq=5 ttl=64 time=13.5 ms",
        "",
        "--- 192.168.250.1 ping statistics ---",
        "5 packets transmitted, 5 received, 0% packet loss, time 4005ms",
        "rtt min/avg/max/mdev = 8.310/12.259/14.082/2.048 ms"
    ]
}