Merge pull request #594 from jcfr/fix-qttesting-checkout-url

QtTesting: Update Git repository URL to fix invalid cert issues.

CMakeExternals/QtTesting.cmake

@@ -36,7 +36,7 @@ if(NOT DEFINED QtTesting_DIR)
     set(location_args GIT_REPOSITORY ${${proj}_GIT_REPOSITORY}
                       GIT_TAG ${revision_tag})
   else()
-    set(location_args GIT_REPOSITORY "${git_protocol}://paraview.org/QtTesting.git"
+    set(location_args GIT_REPOSITORY "${git_protocol}://github.com/Kitware/QtTesting.git"
                       GIT_TAG ${revision_tag})
   endif()