Add E2 Agent
Adds FlexRIC's E2 Agent, as well as a (very!) basic KPM SM.
To enable in 4G or 5G, add --e2_agent.enable
on the command line. To configure in the configuration file, add the following block (works in 4G and 5G):
e2_agent = {
enable = 1;
address = "127.0.0.1";
port = 36421;
sm_dir = "/path/where/the/SMs/are/located/"
}