Fix CID-1222222

Author: imduffy15

plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/discoverer/XcpServerDiscoverer.java

@@ -477,7 +477,7 @@ public boolean configure(String name, Map<String, Object> params) throws Configu
         Boolean.parseBoolean(value);
 
         value = _params.get("xenserver.check.hvm");
-        _checkHvm = false;
+        _checkHvm = Boolean.parseBoolean(value);
         _connPool = XenServerConnectionPool.getInstance();
 
         _agentMgr.registerForHostEvents(this, true, false, true);