Fix xml namespace

[pieterbos]

Fixes #343 . Adds the http://schemas.openehr.org/v1 namespace to the JAXB-bindings.

note that this is a breaking change:

• parsing XML documents without a namespace will no longer work, unless a namespace unaware XMLReader is passed to JAXB
• generated XML documents will now have a namespace
• the RMQueryContext automatically adds namespaces for element/node names, but NOT in predicates, because it does not know what is an element and what is an element. So XPath lookup with element predicates such as [name/value = '...'] will have to be changed to `[openehr:name/openehr:value = '...']. The regular path lookup remains unchanged.

The alternative:

• just keep ignoring namespaces. Then add a SaxFilter to process any XML Output, adding the namespace to the root element by hand.

might be better than this actually...

[codecov]

Codecov Report

Merging #344 (6568e46) into master (e82cfbb) will increase coverage by 0.10%.
The diff coverage is 50.98%.

❗ Current head 6568e46 differs from pull request most recent head 56718a2. Consider uploading reports for the commit 56718a2 to get more accurate results

@@             Coverage Diff              @@
##             master     #344      +/-   ##
============================================
+ Coverage     70.28%   70.38%   +0.10%     
- Complexity     6314     6347      +33     
============================================
  Files           628      629       +1     
  Lines         21266    21350      +84     
  Branches       3411     3425      +14     
============================================
+ Hits          14946    15028      +82     
+ Misses         4713     4708       -5     
- Partials       1607     1614       +7     

Impacted Files	Coverage Δ
...ain/java/com/nedap/archie/aom/LanguageSection.java	100.00% <ø> (ø)
...chie/xml/adapters/ArchetypeTerminologyAdapter.java	88.88% <ø> (ø)
...rchie/xml/adapters/StringDictionaryMapAdapter.java	0.00% <0.00%> (ø)
...nedap/archie/xml/types/XmlResourceDescription.java	93.47% <ø> (+19.56%)	⬆️
...java/com/nedap/archie/rm/composition/Activity.java	36.66% <ø> (ø)
...in/java/com/nedap/archie/rm/datavalues/DvText.java	60.00% <ø> (ø)
...om/nedap/archie/query/ArchieNamespaceResolver.java	33.33% <25.00%> (-4.17%)	⬇️
...java/com/nedap/archie/aom/OperationalTemplate.java	54.54% <29.54%> (-25.89%)	⬇️
.../com/nedap/archie/query/UniqueNodePathBuilder.java	82.60% <50.00%> (-7.40%)	⬇️
.../com/nedap/archie/query/APathToXPathConverter.java	76.56% <62.50%> (+0.19%)	⬆️
... and 12 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e82cfbb...56718a2. Read the comment docs.

[pieterbos]

Needs some extra work for the classes in #346 - not doing it there because it will cause nasty conflicts

[J3173]

There are some commented out things here, are they still needed?