Change the BATCHDATE cookie expansion

[rhness]

The compiler has effectively renamed the BATCHDATE cookie to TIMESTAMP.

This means that the cookie that arrives in a logic table function code will be exactly the same from the point of view of MR95.
But how the cookie is expanded will be different.

We now want the addition of the time values.
Currently the cookie is expanded to a CCYYMMDD value.
We want it to be CCYYMMDDHHNNSS so it will result in a 14 character value.

This logic is in GVBMR96.