chore(submodules): switch submodule URLs from HTTPS to SSH

All submodule remotes now use git@github.com: for key-based
authentication. Public consumers can still clone via HTTPS.

Author: mgingios

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "scripts/python/shared"]
 	path = scripts/python/shared
-	url = https://github.com/abitofhelp/hybrid_scripts_python.git
+	url = git@github.com:abitofhelp/hybrid_scripts_python.git
 [submodule "test/scripts/python/shared"]
 	path = test/scripts/python/shared
-	url = https://github.com/abitofhelp/hybrid_test_python.git
+	url = git@github.com:abitofhelp/hybrid_test_python.git