implemented deletion of tasks

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

user/src/main/java/de/srsoftware/umbrella/user/sqlite/SqliteDB.java

@@ -512,7 +512,7 @@ CREATE TABLE IF NOT EXISTS {0} (
 			rs.close();
 			return users;
 		} catch (SQLException e){
-			throw new UmbrellaException(HTTP_SERVER_ERROR,"Failed to search for user by key = {0}",key);
+			throw new UmbrellaException("Failed to search for user by key = {0}",key);
 		}
 	}