Resource validation doesn't work properly with glob pattern for documentation files.

[mtirionMSFT]

When using a glob pattern for documentation files (e.g. src=., files = /docs//*.md), using just ResourceFolderNames doesn't work. The entire tree of src is scanned for all folders with the name assets or images, instead of in /docs//images/**" for instance. Need resources files to a list of glob patterns as well to make this work properly.

The currently solution works perfectly if just using against 1 /docs hierarchy btw.