[3.2.0] Default versions of Web Socket APIs cannot be invoked without specifying the version in the request URL

[wasuradananjith]

Description:

Default versions of Web Socket APIs cannot be invoked without specifying the version in the request URL

Steps to reproduce:

1. Create a Web Socket API (with version 1.0) and invoke it. The invocations will work.
2. Create a new version (2.0.0) of the above API by selecting it as the default version. Invoke it with a URL with the version (2.0.0), it will work.
3. Invoke it with a URL without the version (since this is the default version the invocation should succeed). The invocation will fail with a socket hangup.
   
4. Server will have the below logs.

   [2021-11-11 14:02:08,554] ERROR - InboundWebsocketSourceHandler Endpoint not found for port : 9099 tenant domain : null
   [2021-11-11 14:02:26,058] ERROR - InboundWebsocketSourceHandler Endpoint not found for port : 9099 tenant domain : null
   

Affected Product Version:

WUM/U2 updated pack to date