When asSystemProxy is false allow running multiple instances #1586
Description
When asSystemProxy is false allow running multiple instances of Dev Proxy. Right now, you get the following error:
Dev Proxy is already running (PID: 1234).
Use 'devproxy stop' to stop it first.
This error stands but only if Dev Proxy was started with asSystemProxy: true. If it's false, then it should be possible to start multiple instances of Dev Proxy.