loadgenerator docs + fix bug in partition assignment

Signed-off-by: Shaanjot Gill gill.shaanjots@gmail.com

@PaulWen

The changes required to run load generator tests using redis_queue plugin [both relay and mediator as bridge] are included in /docs directory.
A docker network needs to defined for the Redis cluster to work, docker network create --subnet=172.28.0.0/24 loadgenerator_network. In the .env, the following should be added:
```
# Redis
REDIS_PASSWORD=test1234
NETWORK_NAME=loadgenerator_network
```

aries-acapy-plugin-redis-events needs to be added to .gitmodules

[submodule "setup/agents/redis-queue"]
path = setup/agents/redis-queue
url = https://github.com/bcgov/aries-acapy-plugin-redis-events

bcgov / aries-acapy-plugin-redis-events