Generate different ids when reusing code snippets.

Generates the ids during template expansion instead of when parsing the
code snippet - so that different ids are used for different exapnsions.
Refs #4416

[SVN r63809]

tools/quickbook

@@ -1 +1 @@
-Subproject commit a6712ee34f43dfb50dacf16904dcc901cd6cbf5a
+Subproject commit 1bc916f41f13fab6ef4309a28ac8af4341eca2c3