#7 DB2 on zOS Compliance

[Sp]

TJDO is not compliant with DB2 on zOS version 7.1 .
Since it is already compliant with DB2 on windows , the
effort for making it DB2 on zOS compliant are not lot.
We have made the changes to TJDO latest code and
would like to submit the patch .
Following changes are required
1. The DatabaseAdapter::isDb2 method enhanced to
check for DB2 on other platforms .

2. DB2 on zOS does not support "CURRENT SCHEMA"
special register. This is used in DB2DatabaseAdapter.
Therefore introduced a new property viz
com.triactive.jdo.schemaName . Modified necessary
code to process this property. The store manager
checks if this property is set and if so does not call
getschema on Database adapter.

All these changes are tested and would like to submit as
a patch.