ENH : change ioOSSIMImageSPOT4MetadataReader into ioOSSIMImageSPOT5MetadataReader (no metadata avaliable)

ENH : add satAz/El in QB, Nominal Collection in SPOT, Viewing angle, step count, scene orientation and incidence angle in SPOT meatadta

ENH: Add Checking cpp source file process (macro OTB_ADD_EXECUTABLE) activate by setting OTB_CPP_CHECK_SOURCE_FILE ON. Set OTB_CPP_CHECK_PROG to cppcheck program.

BUG: Fixing memory reallocation bug in otb::SVMModel. The SetNumberOfClasses() method from otb::SVMModelEstimator has been marked deprecated since it is not needed anymore.