Fix JSON string comparision fin tests (#8183)

Author: rRajivramachandran

server/src/test/java/com/cloud/server/StatsCollectorTest.java

@@ -62,6 +62,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import java.util.TreeMap;
 import java.util.concurrent.TimeUnit;
 
 import static org.mockito.Mockito.when;
@@ -330,7 +331,7 @@ public void persistVirtualMachineStatsTestPersistsSuccessfully() {
         VmStatsVO actual = vmStatsVOCaptor.getAllValues().get(0);
         Assert.assertEquals(Long.valueOf(2L), actual.getVmId());
         Assert.assertEquals(Long.valueOf(1L), actual.getMgmtServerId());
-        Assert.assertEquals(expectedVmStatsStr, actual.getVmStatsData());
+        Assert.assertEquals(convertJsonToOrderedMap(expectedVmStatsStr), convertJsonToOrderedMap(actual.getVmStatsData()));
         Assert.assertEquals(timestamp, actual.getTimestamp());
     }
 
@@ -511,4 +512,14 @@ public void testPersistVolumeStatsKVM() {
     public void testPersistVolumeStatsVmware() {
         performPersistVolumeStatsTest(Hypervisor.HypervisorType.VMware);
     }
+
+    private Map<String, String> convertJsonToOrderedMap(String json) {
+        Map<String, String> jsonMap = new TreeMap<String, String>();
+        String[] keyValuePairs = json.replace("{", "").replace("}","").split(",");
+        for (String pair: keyValuePairs) {
+            String[] keyValue = pair.split(":");
+            jsonMap.put(keyValue[0], keyValue[1]);
+        }
+        return jsonMap;
+    }
 }