newrelic-daemon does not take new key once setup

Steps to reproduce:

1. Create 2 newrelic account.
2. Configure newrelic with first account as shown in https://easyengine.io/handbook/configure-new-relic-in-ee4
3. Wait for newrelic to show data
4. Now change the key to that of 2nd account.
5. Disable and enable site and reload(or stop, kill and start) newrelic daemon container.

Expected output:
The site is registered in 2nd account.

Actual output:
The site is registered in 1st account and does not get re-registered in 2nd account.

I additionally verified it by tailing `/var/log/newrelic/newrelic-daemon.log` in newrelic daemon while it was starting up in step 5.