BUG-8327: Introduce DOMYangTextSourceProvider and implement it
Migration requires that DOMSchemaService provides the capability to
access underlying sources in YANG text. Rather than modifying the
base DOMSchemaService, make it an DOMExtensibleService and define
the appropriate extension, DOMYangTextSourceProvider.
Update OsgiBundleScanningSchemaService to implement the new
extension.
Change-Id: I4c75d8abdf850c42fe69a08201f976271a2cbc8f
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit
985c0859e1ad4a1c2dd734e75a4249ddd6b1e2a8)