datadir: fix unreleased lock on global.xml starting off an empt datadir #457
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`DataDirectoryUpdateSequence` initializes `GeoServerInfo` if not present with a zero'ed `updateSequence`. In doing so, it was loading the `global.xml` through `Resource.in():InputStream`, which in turn automatically acquires a lock on the resource, but it was not closing it, which releases the lock.
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DataDirectoryUpdateSequenceinitializesGeoServerInfoif not present with a zero'edupdateSequence.In doing so, it was loading the
global.xmlthroughResource.in():InputStream, which in turn automatically acquires a lock on the resource, but it was not closing it, which releases the lock.