CreateVMSnapshot: fix typo in API description

This closes #161

Author: resmo

api/src/org/apache/cloudstack/api/command/user/vmsnapshot/CreateVMSnapshotCmd.java

@@ -47,7 +47,7 @@ public class CreateVMSnapshotCmd extends BaseAsyncCreateCmd {
     @Parameter(name = ApiConstants.VIRTUAL_MACHINE_ID, type = CommandType.UUID, required = true, entityType = UserVmResponse.class, description = "The ID of the vm")
     private Long vmId;
 
-    @Parameter(name = ApiConstants.VM_SNAPSHOT_DESCRIPTION, type = CommandType.STRING, required = false, description = "The discription of the snapshot")
+    @Parameter(name = ApiConstants.VM_SNAPSHOT_DESCRIPTION, type = CommandType.STRING, required = false, description = "The description of the snapshot")
     private String description;
 
     @Parameter(name = ApiConstants.VM_SNAPSHOT_DISPLAYNAME, type = CommandType.STRING, required = false, description = "The display name of the snapshot")