Patch from Scott McKellar:

Patch from Scott McKellar:

This patch plugs a memory leak and tweaks a couple of minor things.

1. In osrfCacheGetObject() I added the const qualifier to the "data"
variable, since we don't write through that pointer.

2. In osrfCacheGetString() I corrected an error message that claimed
to be coming from a different function.

3. In osrfCacheSetExpire() we were leaking a jsonObject allocated by
osrfCacheGetObject().  I contrived to free it.

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1269 9efc2488-bf62-4759-914b-345cdb29e865