esx: switch VIR_FREE->g_free in esx*Free*()

esx: switch VIR_FREE->g_free in esx*Free*()

Although the three functions esxFreePrivate(), esxFreeStreamPrivate(),
and esxUtil_FreeParsedUri() are calling VIR_FREE on *object, and so in
theory the caller of the function might rely on "object" (the free
function's arg) being set to NULL, in practice these functions are
only called from a couple places each, and in all cases the pointer
that is passed is a local variable, and goes out of scope almost
immediately after calling the Free function, so it is safe to change
VIR_FREE() into g_free().

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>