Allow immediately executing RPC with no input

Story: https://tree.taiga.io/project/jktjkt-netconf-cli/us/189
Change-Id: I876437b798e995c4484e97b409117a2bb207e864
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 53dda3b..94cd1ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -347,7 +347,7 @@
     cli_test(path_utils)
     target_link_libraries(test_path_utils path)
     cli_test(keyvalue_completion)
-    cli_test(prepare)
+    cli_test(parser_rpc)
 
     configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/init_datastore.bash.in
         ${CMAKE_CURRENT_BINARY_DIR}/init_datastore.bash @ONLY)