in DataView.aadl, there was a part referencing all ACN files, however
the AADL identifier was based on the file name. In the case of several
ACN files with the same name but in different folders, we could have
duplicate identifiers in the AADL file.
This patch makes use of the module name instead of the filename for the
identifier. The module name must be unique.

when interacting with a DLL, the name of the interfaces have to respect
the casing set by buildsupport/kazoo:
<lowecaseFunctionName>_PI_<caseAsTheyAppearInInterfaceViewInterfaceName>

Some types do not need any space for encoding in uPER or ACN (e.g. an enumerated with a
single value), but there was a assert prevening that case, possibly causing
unwanted exceptions at runtime.

This reverts commit 556e8bed.