Add https clone link to wip.

scripts/robotpkg_tests.py

@@ -347,6 +347,7 @@ class RobotpkgTests:
         arch_release_candidates: tuple of pair [ ('package_name','branch_name'), ... ]
         """
         wip_repository="ssh://git@git.openrobots.org/robots/robotpkg/robotpkg-wip wip"
+        wip_repository="https://git.openrobots.org/robots/robotpkg/robotpkg-wip.git"
         self.prepare_robotpkg(wip_repository)
         for package_name,branch_name in arch_release_candidates:
             self.handle_package(package_name,branch_name)