set cod.revision only in case it is a subversion working copy

don't set code.rev in case it is already set

Prevent file not found exception trying to set code.rev property for not svn environments

Fixes bug 0005933: error to create a new element in account schema general ledger (3 Hrs)

Fixes bug 0006006 Renamed Sales Order and Sales Order Line selectors to Order and Order Line respectively since they also display purchase orders and purchase order lines.

Fixes Bug 0004718. Close button is not visible for requisition on Closed status

diagnostics, undeploy diagnostics context after execution

diagnostics, allow to run diagnostics before create.database, in this case show a warning but continue checking other issues

diagnostics, removed dependency with openbravo-core.jar

diagnostics, check for Openbravo.properties file and for source.path property