Add warning for different owner access to stream

[danschultzer]

Based on #101. This gives you better feedback for when the connection unexpectedly closes calling send_resp from another process. Without this you only see:

16:18:05.922 [warning] Header timestamp couldn't be fetched from ETS cache

16:18:05.925 [warning] Stream 3 completed in unexpected state remote_closed

That makes it difficult to understand what happens unless you go through the whole code path that includes GenServer messages (took me some time to figure out). With this PR you instead get these warnings:

16:18:05.922 [warning] Header timestamp couldn't be fetched from ETS cache

16:18:05.925 [warning] Stream 3 was handled by #PID<0.4048.0> but MUST be handled by #PID<0.4366.0>, the connection will complete unexpectedly

16:18:05.925 [warning] Stream 3 was handled by #PID<0.4048.0> but MUST be handled by #PID<0.4366.0>, the connection will complete unexpectedly

16:18:05.925 [warning] Stream 3 completed in unexpected state remote_closed

But the conn response is odd since status will be a nil value and empty body.

[mtrudel]

I like this code! But #117 would make this unnecessary.

[danschultzer]

#117 looks good, closing this!