[ZDWB-104] Added InstanceId to the model for Instances.  Rolled this change through all plugins including DOM-loaders, and all unit tests.  Also fixed the paths for integration tests to be relative to the project root so that they run in NetBeans (actually not my preferred solution - they should be relative to the assembled build root - but this will do for now).
[ZDWB-104] Introduced InstanceId into the state table used by MySql and SqlServer resources.  Also unified the SQL scripts for these two database platforms into a shared AnsiSqlStateHelper.