Description:
------------
When Wincache or APC are installed, the resource IDs are not the same.
This is because Wincache takes a few resource objects for itself.  As a
result, these tests become false positives.

On Windows boxes, the microtime precision is not granular enough
to reliably register a difference if two calls to uniqid() are made
concurrently.  This is a fix to the uniqid() test to avoid the false
positive when run on Windows machines.  Also, added a test to exercise
the 'more_entropy' variant of uniqid().

Expected result:
----------------
Tests should not fail

Actual result:
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Tests fail when extension=php_wincache.dll is configured.