CreateImportJob is now properly send to the job system
Merge pull request #155 from IDgis/async-sql-query

CreateImportJob is now properly send to the job system
QuerydslAnnotationProcessor apt processor enabled on domain
query for handleListCategories moved to Admin itself
moved query from executeGetDataSourceInfo to handleListDatasources
moved query executeGetDatasetColumns db to handleListDatasetColumns
admin;
removed method executeGetDatasetColumns(); removed class
GetDatasetColumns
static imports on top
Merge pull request #156 from IDgis/move-queries-to-service-admin-clean

Move queries to service admin clean
fixed handleListDataSources
Merge pull request #157 from IDgis/fix-handlelistdatasources

fixed handleListDataSources
metadataDocumentFactory actor moved to application level
removed unnecessary fields
unused import removed
xml: UpdateString implemented
GetContent implemented
xml processing refactored to synchronous operation

the asynchronous approach proved to be too clumbersome to implement the
required metadata processing
MetadataGenerator actor added
bootstrapping of h2 en jetty moved into separate class
GetContent implemented
GetDatasetMetadata implemented