Classical connections required to send an EPR pair

[beneboeck]

Describe the bug

In order to share an EPR between two Hosts, there has to be a classical connection between them, which should not be necessary to share an EPR pair.

To Reproduce
Steps to reproduce the behavior:

1. Create two Hosts in the network
2. Create a quantum connection between then using add_q_connection
3. Send an EPR pair between them
4. Observe the EPR never arrives

Expected behavior
An EPR pair should be able to be transmitted with just a quantum connection.