ENH: install share dir share/OTB-X.Y -> share/otb
qgis descriptors are copied to share/otb/description.
This ends up with share/otb/ and share/OTB-X.Y
It is better to have a single directory for and it should be share/otb and not a versioned. Changes included in packaging script show non-versioned 'otb' directory in share is easy to manage than a verisoned one.
In any case, users cannot keep multiple versions of OTB under same prefix.
This was breifly discussed in issue : #1557 (closed)