Fix installation of libssl during the Superbuild

See merge request orfeotoolbox/otb!743

Fix warnings for release 7.2

See merge request orfeotoolbox/otb!741

Revert "BUG: force usage of the ld gold linker for linux QT5 build in the Superbuild (link errors with ld bfd)"

This reverts commit 9df40e7f.

Merge branch '2070-unitialized-values-and-itk-setters-in-otb-imagetogenericrsoutputparameters' into release-7.2

Merge branch 'develop' into 2070-unitialized-values-and-itk-setters-in-otb-imagetogenericrsoutputparameters

The figures were not referenced correctly. We activate
the numfig parameter so that figures can be references to
by their number. We also add captions to the figures.

Update PSC informations

See merge request !738

This reverts commit ba914d9c.

BUG: force usage of the ld gold linker for linux QT5 build in the Superbuild (link errors with ld bfd)

This reverts commit b3c3a183.

Merge branch '2070-unitialized-values-and-itk-setters-in-otb-imagetogenericrsoutputparameters' of https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb into 2070-unitialized-values-and-itk-setters-in-otb-imagetogenericrsoutputparameters

DOC: Deprecate methods that will be removed in OTB 8.0.0

See merge request !728