[Tests] Testing of the server load using Horizon's stress test and python tools

[sagunkho]

Creating more test cases for stress testing the server with n number of players online and interacting with mobs / casting skills etc. This functionality needs to be coded in the python tool but we're just making note of it here as well to work on in the future. With the results of this test we can be sure that the server doesn't have faults and will be stable for production use with multiple online users.

We need tests cases written in the tools for each packet and validate its response if possible.