#361 Hsqldb standalone mode problem

[kubjon]

As the HSQLDB run in a standalone mode allows only one jdbc connection, it is not possible to establish new connections from the netbeans runtime tab and the data visualiser at the same time. The possible workaround for this could be: if the binded database tables are already "connected to" in the Netbeans Runtime Tab get the connection being used by the Netbeans and add it to the Connection Manager so that the Data Visualiser can use it. The problem with this scenario is that the connection can be closed from the Netbeans Runtime tab which would also "disconnect" the visualiser.