Phillip Webb a0862f9146 Support wildcard configtree imports
Update `ConfigTreeConfigDataResource` so that a wildcard suffix can
be used to import multiple folders. The pattern logic from
`StandardConfigDataLocationResolver` has been extracted into a new
`LocationResourceLoader` class so that it can be reused.

Closes gh-22958
2020-10-27 14:14:23 -07:00
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2020-10-27 14:14:23 -07:00