dvar to global

    tasks:
    - name: task
      task:
      - func: cmd
        vars:
          school_name: sydney grammar
          school_address: 1 fox road, sydney, nsw 2000
        dvars:
        - name: school_details
          value: '{{.school_name}} : {{.school_address}}'
          flags: [reg]
        do:
        - name: print
          cmd: '{{.school_name}}'
        - name: print
          cmd: '{{.school_details}}'
      - func: cmd
        do:
        - name: print
          cmd: '{{.school_address}}'
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0078
                 Verbose -> vvv
              ModuleName -> self
               ShellType -> /bin/sh
           MaxCallLayers -> 8
                 Timeout -> 3600000
     MaxModuelCallLayers -> 256
               EntryTask -> task
      ModRepoUsernameRef -> 
      ModRepoPasswordRef -> 
    work dir: /up_project/up
    -exec task: task
    loading [Task]:  ./tests/functests/c0078
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0,
      "school_name": "sydney grammar",
      "school_address": "1 fox road, sydney, nsw 2000",
      "school_details": "sydney grammar : 1 fox road, sydney, nsw 2000"
    })
    
    ~SubStep1: [print:  ]
    sydney grammar
    ~SubStep2: [print:  ]
    sydney grammar : 1 fox road, sydney, nsw 2000
    -Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "school_details": "sydney grammar : 1 fox road, sydney, nsw 2000",
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print:  ]
    None