set catalog description as name if catalog description is null

Signed-off-by: dbulahov <bulahovdenis@gmail.com>

Author: dbulahov

xmla/bridge/src/main/java/org/eclipse/daanse/olap/xmla/bridge/discover/DBSchemaDiscoverService.java

@@ -75,7 +75,8 @@ public List<DbSchemaCatalogsResponseRow> dbSchemaCatalogs(DbSchemaCatalogsReques
     }
 
     public DbSchemaCatalogsResponseRow dbSchemaCatalogsRow(Context catalog) {
-        return new DbSchemaCatalogsResponseRowR(Optional.ofNullable(catalog.getName()), catalog.getDescription(),
+        return new DbSchemaCatalogsResponseRowR(Optional.ofNullable(catalog.getName()),
+                Optional.of((String)catalog.getDescription().orElse("")),
                 getRoles(catalog.getAccessRoles()), Optional.of(LocalDateTime.now()), Optional.empty(),
                 Optional.empty(), Optional.empty(), Optional.empty(), Optional.empty(), Optional.empty(),
                 Optional.empty(), Optional.empty(), Optional.empty());

xmla/bridge/src/main/java/org/eclipse/daanse/olap/xmla/bridge/execute/OlapExecuteService.java

@@ -256,7 +256,9 @@ public StatementResponse statement(StatementRequest statementRequest, RequestMet
         }
 
         Optional<String> oCatalog = statementRequest.properties().catalog();
-
+        if (!oCatalog.isPresent() && contextsListSupplyer.getContexts() != null && contextsListSupplyer.getContexts().size() == 1) {
+            oCatalog = Optional.ofNullable(contextsListSupplyer.getContexts().get(0).getName());
+        }
         if (oCatalog.isPresent()) {
             String catalogName = oCatalog.get();
             Optional<Context<?>> oContext = contextsListSupplyer.getContexts().stream()