cli: fix 'nm -nocheck con up'

When '-nocheck' option was used, NMClient object was created later in the
operation process.
This caused that the callback in nm_client_activate_connection() was not
called. It's fixed by creating NMClient early.

cli/src/connections.c

@@ -2030,6 +2030,9 @@ do_connections (NmCli *nmc, int argc, char **argv)
 		if (!nmc_versions_match (nmc))
 			return nmc->return_value;
 
+		/* Get NMClient object early */
+		nmc->get_client (nmc);
+
 		nmc->should_wait = TRUE;
 
 		args_info.nmc = nmc;