SVN Application not working with XWiki 7.1-milestone-1 or later

XWIKI-12509 introduce Tika parsers 1.8 into XWiki 7.1-milestone-1. In Tika 1.8, NetCDF Java Library has been upgraded to recent version (4.5.5). All recent version of NetCDF now depends on Java Native Access in a version later than 3.4.
In JNA 3.5, a non backward compatible change has been introduced: Structure.getFieldOrder() supersedes Structure.setFieldOrder() and is now required (see [changelog](https://github.com/java-native-access/jna/blob/master/CHANGES.md#features-4)).
When JNA is available in the classpath, SVNkit attempt to use it, and since we actually depends on SVNkit 1.3.8 which rely on JNA 3.4, the JNA library found trigger the usage of incompatible code.
We need to find a way to avoid SVNkit to use JNA, or attempt to upgrade SVNkit to a more recent version, and expect that what it does with JNA does not harm.