Downgrade container warning to debug message

Test: toolchain/jdk/build/build-openjdk17-linux.sh -d jdk17.dist build
Change-Id: I4763aedeb5ff053ab8687381a201992011bb1977
diff --git a/src/hotspot/os/linux/cgroupSubsystem_linux.cpp b/src/hotspot/os/linux/cgroupSubsystem_linux.cpp
index fb653c7..8b9693d 100644
--- a/src/hotspot/os/linux/cgroupSubsystem_linux.cpp
+++ b/src/hotspot/os/linux/cgroupSubsystem_linux.cpp
@@ -308,12 +308,12 @@
             // the main cgroup controllers most likely under /sys/fs/cgroup. In that
             // case pick the one under /sys/fs/cgroup and discard others.
             if (strstr(cg_infos[CPUSET_IDX]._mount_path, "/sys/fs/cgroup") != cg_infos[CPUSET_IDX]._mount_path) {
-              log_warning(os, container)("Duplicate cpuset controllers detected. Picking %s, skipping %s.",
+              log_debug(os, container)("Duplicate cpuset controllers detected. Picking %s, skipping %s.",
                                          tmpmount, cg_infos[CPUSET_IDX]._mount_path);
               os::free(cg_infos[CPUSET_IDX]._mount_path);
               cg_infos[CPUSET_IDX]._mount_path = os::strdup(tmpmount);
             } else {
-              log_warning(os, container)("Duplicate cpuset controllers detected. Picking %s, skipping %s.",
+              log_debug(os, container)("Duplicate cpuset controllers detected. Picking %s, skipping %s.",
                                          cg_infos[CPUSET_IDX]._mount_path, tmpmount);
             }
           } else {