zOs/TX/TSALT

* alter ts
*    bufferPool (phase // 10)  1 ==> BP1, 3 ==> bp32K else bp2
*    dsSize     ($phase % 10 // 2) = 0 ==> 16g else 4g
*    segsize    ($phase % 20 // 2) = 0 ==> 64 else 8
creDb src 23
+ ok creDb DSN.TX.GENF(TSALTs23) ::f
creDb trg 3
+ ok creDb DSN.TX.GENF(TSALTt3) ::f