COMP: In ctkDashboardDriverScript, use read-only github address.

That avoid the 'publickey' error message

CMake/ctkDashboardDriverScript.cmake

@@ -92,7 +92,7 @@ if(empty_binary_directory)
 endif()
 
 if(NOT EXISTS "${CTEST_SOURCE_DIRECTORY}")
-  set(CTEST_CHECKOUT_COMMAND "${CTEST_GIT_COMMAND} clone git@github.com:pieper/CTK.git ${CTEST_SOURCE_DIRECTORY}")
+  set(CTEST_CHECKOUT_COMMAND "${CTEST_GIT_COMMAND} clone http://github.com/pieper/CTK.git ${CTEST_SOURCE_DIRECTORY}")
 endif()
 
 set(CTEST_UPDATE_COMMAND "${CTEST_GIT_COMMAND}")