[webapp remote-connection] - webapp:BrokenPipe error when trying to create TCP tunnel for SSH

**Describe the bug**
After starting a TCP tunnel and trying to ssh to localhost on the specified port, the az tunnel crashes immediately after a BrokenPipeError: [Errno 32] Broken pipe

**To reproduce**
I don't know the cause. On my system it crashes everytime. Please read my comments in additional context

**Expected behavior**
I expect the ssh connection to establish

**Environment summary**
Python3.7.2_2 installed via brew. az-cli installed via brew. Pyenv used for other projects. Installed versions using pyenv are 2.7.15 and 3.6.5

**Additional context**
I have tried reinstalling everything through brew. I tried brew doctor. I tried brew link python. I tried to reinstall python and then brew link python again. I tried to link brews python versions to pyenv paths. I exhausted all possible search terms on google.

**Verbose output from crash**
```
az webapp remote-connection create -g MYRESRCGROUP -n MYAPP -p 1337 --verbose
Port 1337 is open
Creating a socket on port: 1337
Setting socket options
Binding to socket on local address and port
Finished initialization
Status response message: FAILURE:2222:Unable to connect to WebApp
WARNING - Remote debugging may not be setup properly. Reponse content: FAILURE:2222:Unable to connect to WebApp
SSH is available { username: root, password: Docker! }
Start your favorite client and connect to port 1337
```
In another window i used `ssh root@127.0.0.1 -p 1337`
```
Websocket tracing enabled
--- request header ---
GET /AppServiceTunnel/Tunnel.ashx HTTP/1.1
Upgrade: websocket
Connection: Upgrade
Host: MYDOMAIN.scm.azurewebsites.net
Origin: http://MYDOMAIN.scm.azurewebsites.net
Sec-WebSocket-Key: RQM/U3LlGAC45h3cBVfZ+g==
Sec-WebSocket-Version: 13
Authorization: Basic JGtvbW11bnBvcnRhbDpjN3hXaFBuckxxQnVkMktZTWpQRG9ObzhuelFpOGRTcjdscTVna1FaZ0tMclNjNHJ6Sm5xMGMwZGI0QU0=

-----------------------
--- response header ---
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Server: Kestrel
Sec-WebSocket-Accept: Hb1GVBHYowi3+S7XGOYT4aj54fo=
Set-Cookie: ARRAffinity=bf607f7282cfa28719bacd3fbabae13c629c7e590d103982a12542d52319894c;Path=/;HttpOnly;Domain=MYDOMAIN.scm.azurewebsites.net
Connection: Upgrade
Access-Control-Allow-Origin: http://MYDOMAIN.scm.azurewebsites.net
Access-Control-Expose-Headers: ETag,Content-Length,Content-Encoding,Date
Date: Wed, 20 Mar 2019 13:45:24 GMT
-----------------------
Websocket, connected status: True
Got debugger connection... index: 1
Waiting for debugger data, index: 1
Received debugger data, nbytes: 21, index: 1
Sending to websocket, response data: bytearray(b'SSH-2.0-OpenSSH_7.9\r\n'), index: 1
send: b'\x82\x95\x15D\xef\xe7F\x17\xa7\xca\'j\xdf\xcaZ4\x8a\x89F\x17\xa7\xb8"j\xd6\xea\x1f'
Waiting for websocket data, connection status: True, index: 1
Both debugger and websocket threads started...
Successfully connected to local server..
Received frame: fin=1 opcode=8 data=b'\x03\xf3Connection failure. Connection refused 172.19.0.3:2222'
send: b'\x88\x82[\xba\xcf\x9cXR'
Traceback (most recent call last):
File "/Users/myname/.azure/cliextensions/webapp/azext_webapp/tunnel.py", line 146, in _listen_to_web_socket
data = ws_socket.recv()
File "/Users/myname/.azure/cliextensions/webapp/azext_webapp/tunnel.py", line 32, in recv
data = super(TunnelWebSocket, self).recv()
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 313, in recv
opcode, data = self.recv_data()
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 330, in recv_data
opcode, frame = self.recv_data_frame(control_frame)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 357, in recv_data_frame
self.send_close()
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 390, in send_close
self.send(struct.pack('!H', status) + reason, ABNF.OPCODE_CLOSE)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 253, in send
return self.send_frame(frame)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 278, in send_frame
l = self._send(data)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 448, in _send
return send(self.sock, data)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_socket.py", line 151, in send
return _send()
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_socket.py", line 136, in _send
return sock.send(data)
File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/ssl.py", line 984, in send
return self._sslobj.write(data)
ssl.SSLError: [SSL: BAD_LENGTH] bad length (_ssl.c:2337)
Traceback (most recent call last):
File "/Users/myname/.azure/cliextensions/webapp/azext_webapp/tunnel.py", line 175, in _listen_to_client
ws_socket.send_binary(responseData)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 284, in send_binary
return self.send(payload, ABNF.OPCODE_BINARY)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 253, in send
return self.send_frame(frame)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 278, in send_frame
l = self._send(data)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_core.py", line 448, in _send
return send(self.sock, data)
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_socket.py", line 151, in send
return _send()
File "/usr/local/Cellar/azure-cli/2.0.60/libexec/lib/python3.7/site-packages/websocket/_socket.py", line 136, in _send
return sock.send(data)
File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/ssl.py", line 984, in send
return self._sslobj.write(data)
BrokenPipeError: [Errno 32] Broken pipe
Both debugger and websocket threads stopped...
Stopped local server..
```