[flow counter] Fix issue: should not compare str with int #2001
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What I did
When clearing stats, current flow counter stats is serialized to a file for further compare. All stats value is saved as string value. When doing diff, the loaded stats value shall be convert into int and do the compare. The PR is to fix this issue.
How I did it
How to verify it
Previous command output (if the output of a command-line utility has changed)
New command output (if the output of a command-line utility has changed)