1. In main() we allocate a growing_buffer named "json". I added a

1. In main() we allocate a growing_buffer named "json".  I added a
line to free it.

2. In commitTransaction() and rollbackTransaction() I eliminated
a layer of jsonObjectClone(), along with the associated
jsonObjectFree().  Now we extract the string we want directly from
the original object without making an unnecessary copy.

3. I renamed the four macros starting with "E" so as to start
with "E_" instead.

4. All functions (other than main()) are now static, as are the three
variables that had been declared at global scope.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@8550 dcc99617-32d9-48b4-a31d-7c20da2025e4