Fixes for PostgresSQL tests.
When dropping all objects, use QUOTE_ALL_OBJECTS strategy as
the names that come back from the database metadata are case sensitive.
Removed defaultNullValue for intValue in AddNotNullConstraint.
The handling of the default value data type needs to be improved.
ints are treated as string values currently.

Added fix for CreateIndexChange to output in diffs correctly.
Getters and setters need to be present for a property for it to be
included.