functional_tests: hide check_missing_rpc_methods behind requests check

tests/functional_tests/CMakeLists.txt

@@ -69,11 +69,10 @@ if (REQUESTS_OUTPUT STREQUAL "OK")
   add_test(
     NAME    functional_tests_rpc
     COMMAND ${PYTHON_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/functional_tests_rpc.py" "${PYTHON_EXECUTABLE}" "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" all)
+  add_test(
+    NAME    check_missing_rpc_methods
+    COMMAND ${PYTHON_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/check_missing_rpc_methods.py" "${CMAKE_SOURCE_DIR}")
 else()
-  message(WARNING "functional_tests_rpc skipped, needs the 'requests' python module")
-  set(CTEST_CUSTOM_TESTS_IGNORE ${CTEST_CUSTOM_TESTS_IGNORE} functional_tests_rpc)
+  message(WARNING "functional_tests_rpc and check_missing_rpc_methods skipped, needs the 'requests' python module")
+  set(CTEST_CUSTOM_TESTS_IGNORE ${CTEST_CUSTOM_TESTS_IGNORE} functional_tests_rpc check_missing_rpc_methods)
 endif()
-
-add_test(
-  NAME    check_missing_rpc_methods
-  COMMAND ${PYTHON_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/check_missing_rpc_methods.py" "${CMAKE_SOURCE_DIR}")