Avoid introspection during discovery

[bradbishop]

Speed up discovery by calling GetManagedObjects on any ObjectManagers.
Fall back on introspection for parent elements or services that don't
implement one.

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This change is

[causten]

Review status: 0 of 1 files reviewed at latest revision, 1 unresolved discussion.

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phosphor-mapper, line 94 [r1] (raw file):

                    bool,
                    [x.attrib.get('name') for x in root.findall('node')])
                children = [

does this negate what children was on the line before?

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Comments from Reviewable

[bradbishop]

Review status: 0 of 1 files reviewed at latest revision, 1 unresolved discussion.

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phosphor-mapper, line 94 [r1] (raw file):

Previously, causten (Chris Austen) wrote…

does this negate what children was on the line before?

yes - that was the intent.

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Comments from Reviewable

[causten]

Reviewed 1 of 1 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable