RPL-66: Fix - Ansible plugin - Resource Model Source throws NullPointerException #397
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⛔️ Ticket
https://pagerduty.atlassian.net/browse/RPL-66
❌ Issue
After upgrading to version 4.x of the Ansible plugin, any version after 3.12, the Ansible Resource Model Source, even after being configured properly, will throw Null Pointer errors in the service.log and return cached data only
✅ Fix
Added a tag validator method to check if all, children and hosts is empty or null.