Add support to configure RMQ virtual host in deployment.toml file

[AboOmar]

To reuse a RabbitMQ connection as per the documentation , one must add connection parameters in the deployment.toml file. However, when specifying RMQ virtual host, the WSO2 MI server fails to recognize this value, resulting in authorization exceptions upon connection attempts to RMQ

Despite adding the values below, the server does not utilize the virtual host during the connection process to RMQ.

[[transport.rabbitmq.sender]]
name = "RabbitMQConnectionFactory"
parameter.hostname = "localhost"
parameter.port = 5672
parameter.vhost = "TestVHost" (parameter.virtualhost) (parameter.virtual.host)
parameter.username = "guest"
parameter.password = "guest"

It will be a performance win if this can be fixed to reuse connection factory in such cases.

Regards,