Pleiades : improve input DIMAP support

Description

When a user provides a DIMAP as an input of an OTB application (instead of a jp2/tif), the metadata read by OTB are not correct which leads to issues in the application's output. This is due to GDAL's DIMAP driver not giving the same metadata as the JP2. In OTB 7.x, the dimap metadata reading was done using OSSIM, which has been removed in OTB 8.x

Steps to reproduce

In OTB 8.x , calling OpticalCalibration -in DIM_PHR.XML leads to the following error : Unknown sensor, Additional parameters are necessary, please provide them The same kind of error happens in Orthorectification for example

Configuration information

Reproduced on Ubuntu 18.04, OTB 8.0-alpha