Do not inline NodeContextSuppliers

Do not inline NodeContextSuppliers

As it turns out, NodeContextSuppliers really need to be coming
from parent, as we can be rehosting objects into different
namespaces -- in which case a single object will need to be
interpreted in terms of the NodeContextSupplier in its parent,
i.e. with a different schema.

This patch undoes most of Iaf227e78d2b6546d34c2133fc31912c0a8dde4b3
and I9e24c30535c536d70b4eb60035b5aa744fc6ec9d, in that
NodeContextSuppliers are not inlined as constants, but rather
looked up.

Unlike the previous lookup by method name, we are using localName
and Class, just as we do in stremers and hence we are reusing
indices which support streamers.

The ability to inlike NodeContextSuppliers is retained, but since
DataObjectContext does not have enough information from
BindingRuntimeContext, this facility is not used.

JIRA: MDSAL-443
Change-Id: I82bff8657845bdab27aa3aa8c24a949c4758f1bb
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>