tests: clean up paths

.gitmodules

 [submodule "contrib/libfaketime"]
 	path = contrib/libfaketime
 	url = https://github.com/wolfcw/libfaketime.git
-[submodule "tests/integration"]
-	path = tests/deckard
-	url = https://gitlab.labs.nic.cz/knot/deckard.git
 [submodule "contrib/libswrap"]
 	path = contrib/libswrap
 	url = https://gitlab.labs.nic.cz/labs/socket_wrapper.git
+[submodule "tests/deckard"]
+	path = tests/deckard
+	url = https://gitlab.labs.nic.cz/knot/deckard.git