Always let the initiator send a REQ_KEY once a connection is activated.

Always let the initiator send a REQ_KEY once a connection is activated.

Before, the logic was to do this when the graph reported a bidirectional
edge. However, there was a possibility that if two nodes connect to each
other simultaneously, causing a second connection to be activated while the
first was also still active, which caused the REQ_KEY to not be sent.