fix dettach iso issue: if dettach iso failed on hypervisor, mgt server still regards it as success, then you can't attach another ISO to the vm again unless your stop/start the VM

cloud.spec

@@ -221,7 +221,6 @@ Requires: jpackage-utils
 Requires: %{name}-daemonize
 Requires: /sbin/service
 Requires: /sbin/chkconfig
-Requires: jnetpcap
 Group:     System Environment/Libraries
 
 %package baremetal-agent
@@ -304,6 +303,7 @@ The Cloud.com command line tools contain a few Python modules that can call clou
 %package premium-agent
 Summary: Cloud.com premium agent
 Requires: cloud-agent
+Requires: jnetpcap
 Group:     System Environment/Libraries
 %description premium-agent
 The Cloud.com premium agent

server/src/com/cloud/template/TemplateManagerImpl.java

@@ -827,7 +827,7 @@ public class TemplateManagerImpl implements TemplateManager, Manager, TemplateSe
              vm.setIsoId(iso.getId());
             _userVmDao.update(vmId, vm);
         } 
-        if ( !attach ) {
+        if ( success && !attach ) {
             vm.setIsoId(null);
             _userVmDao.update(vmId, vm);
         }