BUG 2412 - restconf @POST createConfigurationData(payload) method migration
* migration to new faster Infrastructure API and Codecs for method
@POST createConfigurationData(NormalizedNodeContext) on @Path {/config}
New faster Infrastructure API works with NormizedNodeContext and
we are replacing createConfigurationData(NormalizedNodeContext) from
RestconfService to use NormalizedNodeContext.
* add fix or comment tests - problem with RestconfDocumentedExceptionMapper
- it has to be fixed in future commit in this chain
Change-Id: I4ec69712535c322ba8bb8ba8be7943589c10d69b
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>