Fix Usage failed to get pid (#4144)

* Update UsageManagerImpl.java

When System.getProperty Failure to get the PID will cause the service to stay in the config phase. The startup cannot continue and there will be no log output
Use managementfactory to get the PID and throw an exception when the PID cannot be obtained.

* Update usage/src/main/java/com/cloud/usage/UsageManagerImpl.java

Co-authored-by: dahn <daan.hoogland@gmail.com>

* Update UsageManagerImpl.java

* Update UsageManagerImpl.java

* Update UsageManagerImpl.java

Co-authored-by: dahn <daan.hoogland@gmail.com>

Author: div8cn

usage/src/main/java/com/cloud/usage/UsageManagerImpl.java

@@ -278,7 +278,14 @@ public boolean configure(String name, Map<String, Object> params) throws Configu
             s_logger.error("Unhandled exception configuring UsageManger", e);
             throw new ConfigurationException("Unhandled exception configuring UsageManager " + e.toString());
         }
-        _pid = Integer.parseInt(System.getProperty("pid"));
+
+        try {
+            _pid = (int) ProcessHandle.current().pid();
+        } catch (Exception e) {
+            String msg = String.format("Unable to get process Id for %s!", e.toString());
+            s_logger.debug(msg);
+            throw new ConfigurationException(msg);
+        }
         return true;
     }