Add IP and port to client args

[pauleaster]

Server initialisation already has the IP and port as arguments:

Server::Server(const std::string &certificateEnvVar, const std::string &privateKeyEnvVar, const std::string serverIP, const unsigned short port)

But Client does not:

Client::Client(const std::string &certificateEnvVar, const std::string &privateKeyEnvVar)

Update client and its dependencies to include the two extra paramters.