Tests for burpui-agent and compatibility version

[pablodav]

@ziirish

Should I revert to 0.6.1 the default version used until I get compatibility on burp-server role with 2.2.12+ ?

See discussion: CoffeeITWorks/ansible_burpui_server#15

Also I have noticed all my tests passed due to the fact the burpui-agent service starts well, but probably the service is not working properly due to issue with new burp -V parameter.
So I want to add an step to test if the service really works, what is the simplest way to do it? with a simple curl command or checking the log? or should I write a python script to connect to the agent and test?

@deajan any other idea?