REFAC: begin upgrade to qt5 signal/slot syntax

Modules/Wrappers/QtWidget/include/otbWrapperQtWidgetModel.h

Modules/Wrappers/QtWidget/include/otbWrapperQtWidgetView.h

Modules/Wrappers/QtWidget/src/otbApplicationLauncherQt.cxx

Modules/Wrappers/QtWidget/src/otbQtFileSelectionWidget.cxx

...Wrappers/QtWidget/src/otbWrapperQtWidgetBoolParameter.cxx

...appers/QtWidget/src/otbWrapperQtWidgetChoiceParameter.cxx

...QtWidget/src/otbWrapperQtWidgetInputFilenameParameter.cxx

Modules/Wrappers/QtWidget/src/otbWrapperQtWidgetModel.cxx

...tWidget/src/otbWrapperQtWidgetOutputFilenameParameter.cxx

...s/QtWidget/src/otbWrapperQtWidgetOutputImageParameter.cxx

...s/QtWidget/src/otbWrapperQtWidgetSimpleProgressReport.cxx

Modules/Wrappers/QtWidget/src/otbWrapperQtWidgetView.cxx

...s/Wrappers/QtWidget/test/otbWrapperQtWidgetShowWidget.cxx