Improve namespace handling

[clicon]

Improve namespace handling

[olofhagsand]

There are more examples of not correct namespace handling.
In the following restconf example "example-jukebox:" is ignored:
GET /restconf/data/example-jukebox:jukebox/
It still (usually) works since the topnodes are scanned, but is not correct.
Same for netconf cases, such as:
rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0#" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">
and others.

[olofhagsand]

Namespaces should now be properly tagged with xmlns attribute for both netfonf and restconf. JSON uses module names for indicating namespaces. There is still a default namespace, so it is possible to call which means .
This is valid for the develop branch which will be merged into master and 3.9 during January.