Merge branch 'fix/python2Dependency' into 'master'

Enable python3 for the whole superbuild.

See merge request !23

CMakeLists.txt

@@ -129,6 +129,9 @@ if (WIN32)
   endif()
 endif()
 
+# Enable python 3 for the whole superbuild
+set(ENABLE_python3 True CACHE BOOL INTERNAL)
+
 if(UNIX)
   # The following variable is used to define if python libs have to be used from the system 
   # directory (USE_SYSTEM_python3=True) or shipped in install dir (USE_SYSTEM_python3=False)