re-order the way that random data is created, making it slightly more

[Linas Vepstas]

Log Message:
-----------
re-order the way that random data is created,
making it slightly more random.

Modified Files:
--------------
    gnucash/src/engine/test:
        test-split-vs-account.c
    gnucash/src/engine/test-core:
        test-engine-stuff.c
        test-engine-stuff.h