Github user snoopdave commented on the issue:
https://github.com/apache/usergrid/pull/408
Those two files are generated by the ANTLR parser generator as part of the
build process.
It would be much better for the build process to put those two files into a
directory on der the target directory, e.g. "target/generated" so they do not
cause problems, and don't have to be ignored.
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