Issue 289: filter file names one component at a time on 3.x branch

[pbarnes-tibco]

This PR filters file pathnames one component at a time in order to avoid conflicts between the configured escapeString and the file separator. By filtering a component at a time, the file separator does not occur in the path name component being filtered.

This is a fix for issue #289, on the maven-filtering-3.x branch.

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[github-actions]

@cstamas Please assign appropriate label to PR according to the type of change.