Fix crash when execing invalid RPC

When executing an invalid RPC, the temporary datastore wasn't being
properly canceled.

Issue: https://tree.taiga.io/project/jktjkt-netconf-cli/issue/209
Change-Id: I56e301c509781275bd960f4cd846d649507a875d
diff --git a/tests/datastore_access.cpp b/tests/datastore_access.cpp
index ececd0c..9eeed2a 100644
--- a/tests/datastore_access.cpp
+++ b/tests/datastore_access.cpp
@@ -17,6 +17,7 @@
 using OnInvalidSchemaPathDelete = DatastoreException;
 using OnInvalidSchemaPathMove = sysrepo::sysrepo_exception;
 using OnInvalidRpcPath = sysrepo::sysrepo_exception;
+using OnInvalidRpcInput = sysrepo::sysrepo_exception;
 using OnKeyNotFound = void;
 using OnExec = void;
 #elif defined(netconf_BACKEND)
@@ -24,6 +25,7 @@
 using OnInvalidSchemaPathDelete = std::runtime_error;
 using OnInvalidSchemaPathMove = std::runtime_error;
 using OnInvalidRpcPath = std::runtime_error;
+using OnInvalidRpcInput = std::runtime_error;
 using OnKeyNotFound = std::runtime_error;
 using OnExec = void;
 #include "netconf_access.hpp"
@@ -35,6 +37,7 @@
 using OnInvalidSchemaPathDelete = DatastoreException;
 using OnInvalidSchemaPathMove = DatastoreException;
 using OnInvalidRpcPath = DatastoreException;
+using OnInvalidRpcInput = std::logic_error;
 using OnKeyNotFound = DatastoreException;
 using OnExec = std::logic_error;
 #else
@@ -1024,6 +1027,13 @@
         {
             catching<OnInvalidRpcPath>([&] { datastore->execute("/example-schema:non-existing", DatastoreAccess::Tree{}); });
         }
+
+        SECTION("invalid RPC exec resets temporary datastore")
+        {
+            proxyDatastore.initiate("/example-schema:setIp");
+            catching<OnInvalidRpcInput>([&] { auto output = proxyDatastore.execute(); });
+            REQUIRE(proxyDatastore.inputDatastorePath() == std::nullopt);
+        }
     }
 
     SECTION("action")