[BACKPORT] catch exception when method can't be make accessible

[alex-dukhno]

This is a backport of #15892

We get the following exception when MC 3.12 version run on Java 11 Jenkins build:

Hazelcast Management Center Service will be shutdown due to exception.
java.lang.ExceptionInInitializerError: null
	at com.hazelcast.memory.DefaultMemoryStats.getTotalPhysical(DefaultMemoryStats.java:32)
	at com.hazelcast.monitor.impl.LocalMemoryStatsImpl.<init>(LocalMemoryStatsImpl.java:71)
	at com.hazelcast.internal.management.TimedMemberStateFactory.getMemoryStats(TimedMemberStateFactory.java:157)
	at com.hazelcast.internal.management.TimedMemberStateFactory.createMemberState(TimedMemberStateFactory.java:196)
	at com.hazelcast.internal.management.TimedMemberStateFactory.createTimedMemberState(TimedMemberStateFactory.java:130)
	at com.hazelcast.internal.management.ManagementCenterService$PrepareStateThread.run(ManagementCenterService.java:440)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make public long com.sun.management.internal.OperatingSystemImpl.getTotalPhysicalMemorySize() accessible: module jdk.management does not "opens com.sun.management.internal" to unnamed module @76a3e297
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:340)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:280)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
	at com.hazelcast.util.OperatingSystemMXBeanSupport.readLongAttribute(OperatingSystemMXBeanSupport.java:72)
	at com.hazelcast.memory.MemoryStatsSupport.<clinit>(MemoryStatsSupport.java:26)
	... 6 common frames omitted