[BUG]Event Log file cleanup skip

[khushbr]

What is the bug?
This code is where the 'MetricsPurgeActivity' scans the PA metric location (defaulting to /dev/shm/performanceanalyzer/) and deletes all the files with last modified time greater than (referenceTime - purgeInterval). We have seen cases where the event log files keep lingering beyond the 60s window and it happens because 'MetricsPurgeActivity' is run as other collectors and is muted as per this recent code if the collector is taking longer to complete the execution.

What is the expected behavior?
Even log files should be cleaned after 60s time window