runtime merge

    scopes:
    - name: global
      vars:
        a: global-a
        b: global-b
        c: global-c
        d: global-d
    - name: prod
      members: [dr, prod]
      vars:
        a: prod-a
        c: prod-c
    - name: nonprod
      members:
      - dev
      - st
      - staging
      vars:
        a: non-prod-a
        b: non-prod-b
        c: non-prod-c
    - name: staging
      vars:
        a: staging-a
        b: staging-b
    - name: dev
      vars:
        a: dev-a
        c: dev-c
    vars:
      a: runtime-a
      e: runtime-e
      k: runtime-k
    tasks:
    - name: task
      task:
      - func: shell
        vars:
          e: local-e
          m: local-m
        do:
        - echo "test out the var scopes only"
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0011
                 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/c0011
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "d": "global-d",
      "a": "runtime-a",
      "b": "non-prod-b",
      "up_runtime_task_layer_number": 0,
      "m": "local-m",
      "e": "local-e",
      "k": "runtime-k",
      "c": "dev-c"
    })
    
    cmd( 1):
    echo "test out the var scopes only"
    
    -
    test out the var scopes only
    
    -
     .. ok
    . ok