vTPM: do not set Key due to 'Cannot add multiple devices using the same device key..'

Author: weizhouapache

plugins/hypervisors/vmware/src/main/java/com/cloud/hypervisor/vmware/resource/VmwareResource.java

@@ -3234,7 +3234,6 @@ protected void configureVirtualTPM(VirtualMachineMO vmMo, VirtualMachineTO vmSpe
             description.setLabel("Trusted Platform Module");
             VirtualTPM virtualTPM = new VirtualTPM();
             virtualTPM.setDeviceInfo(description);
-            virtualTPM.setKey(-1);
             VirtualDeviceConfigSpec deviceConfigSpec = new VirtualDeviceConfigSpec();
             deviceConfigSpec.setDevice(virtualTPM);
             deviceConfigSpec.setOperation(VirtualDeviceConfigSpecOperation.ADD);