Lower socket timeout in PHP-1065 test

@bjori: I attempted to use `0` for `socketTimeoutMS`, but it appeared to never time out. I was under the impression that `-1` meant "wait forever" and `0` would be an instantaneous time out.

Beyond that, I just cleaned up some of the other code in the test case. There was no need to insert 8000 documents with extra fields, so I toned that down to 1000 documents with a non-indexed field we can then query by.