add standalone assembly

duniter4j-elasticsearch/pom.xml

...-elasticsearch/src/main/assembly/config/elasticsearch.yml

duniter4j-elasticsearch/src/main/assembly/standalone.xml

...lasticsearch/exception/DuniterElasticsearchException.java

...a/org/duniter/elasticsearch/rest/RestXContentBuilder.java

.../org/duniter/elasticsearch/rest/XContentRestResponse.java

...ter/elasticsearch/rest/XContentThrowableRestResponse.java

duniter4j-elasticsearch/src/test/es-home/config/logging.yml