kvm: skip test that can't run and pass on M1 mac (#6537)

This fixes the build issue on M1 mac/osx.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr

plugins/hypervisors/kvm/src/test/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResourceTest.java

@@ -5590,6 +5590,9 @@ public void testMemoryFreeInKBsDomainReturningNoMemoryStatistics() throws Libvir
 
     @Test
     public void getMemoryFreeInKBsTestDomainReturningIncompleteArray() throws LibvirtException {
+        if (!System.getProperty("os.name").equals("Linux")) {
+            return;
+        }
         LibvirtComputingResource libvirtComputingResource = new LibvirtComputingResource();
 
         MemoryStatistic[] mem = createMemoryStatisticFreeMemory100();