syscalls/setrlimit06: lower RLIMIT_CPU parameters

Lower the parameters so that test completes faster where possible.

This also increases alarm timer slightly, which in combination with
lower RLIMIT_CPU aims to avoid false positives in environments with
high steal time, where it can take multiple of wall clock seconds
to spend single second on a cpu.

Signed-off-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Xiao Yang <ice_yangxiao@163.com>
Acked-by: Li Wang <liwang@redhat.com>
diff --git a/testcases/kernel/syscalls/setrlimit/setrlimit06.c b/testcases/kernel/syscalls/setrlimit/setrlimit06.c
index 726b268..3e5bf1d 100644
--- a/testcases/kernel/syscalls/setrlimit/setrlimit06.c
+++ b/testcases/kernel/syscalls/setrlimit/setrlimit06.c
@@ -59,8 +59,8 @@
 	pid = SAFE_FORK();
 	if (!pid) {
 		struct rlimit rlim = {
-			.rlim_cur = 2,
-			.rlim_max = 3,
+			.rlim_cur = 1,
+			.rlim_max = 2,
 		};
 
 		TEST(setrlimit(RLIMIT_CPU, &rlim));
@@ -70,7 +70,7 @@
 			exit(1);
 		}
 
-		alarm(10);
+		alarm(20);
 
 		while (1);
 	}