[CONUTILS]: Remove that overengineered splitted library stuff, and just rely on the...

[CONUTILS]: Remove that overengineered splitted library stuff, and just rely on the splitting of the source code files instead. This is simpler and does the same job as I wanted to do initially (thanks Amine and Thomas for the feedback).
CORE-10504 #resolve
[APPS]: Use again just the conutils library.
The effect of these two modifications above is to partly revert r73024 (the code splitting remains on the contrary).
[CMAKE]: Remove the "evil workaround" (revert r73027). See CORE-12206 for more details.

svn path=/trunk/; revision=73110