com/sun/management/OperatingSystemMXBean/TestTotalSwap.java: Expected total swap size ... but getTotalSwapSpaceSize returned ...

Test com/sun/management/OperatingSystemMXBean/TestTotalSwap.java
might fail intermittently on linux or mac
Example:
----------System.out:(8/459)----------
Command line: [/usr/sbin/sysctl -n vm.swapusage]
[2021-08-19T00:11:44.129957Z] Gathering output for process 78603
[2021-08-19T00:11:44.453475Z] Waiting for completion for process 78603
[2021-08-19T00:11:44.453653Z] Waiting for completion finished for process 78603
Output and diagnostic info for process 78603 was saved into 'pid-78603-output.log'
total = 13312.00M used = 11447.75M free = 1864.25M (encrypted)

Total swap space size in bytes: 12884901888
----------System.err:(12/779)----------
java.lang.RuntimeException: Expected total swap size : 13958643712 but getTotalSwapSpaceSize returned: 12884901888
at TestTotalSwap.main(TestTotalSwap.java:92)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Expected total swap size : 13958643712 but getTotalSwapSpaceSize returned: 12884901888