Don't log invalid cgroup memory limits

lib/util.js

@@ -189,6 +189,11 @@ function getCgroupMemoryLimitBytes(limitFile, logger) {
         return undefined;
     }
     const displayLimit = `${Math.floor(limit / (1024 * 1024))} MiB`;
+    if (limit > os.totalmem()) {
+        logger.debug(`While resolving RAM, ignored the file ${limitFile} that may contain a cgroup memory limit as ` +
+            `its contents ${displayLimit} were greater than the total amount of system memory.`);
+        return undefined;
+    }
     if (limit < MINIMUM_CGROUP_MEMORY_LIMIT_BYTES) {
         logger.info(`While resolving RAM, ignored a cgroup limit of ${displayLimit} in ${limitFile} as it was below ${MINIMUM_CGROUP_MEMORY_LIMIT_BYTES / (1024 * 1024)} MiB.`);
         return undefined;