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##### SUMMARY
The [__combine__ filter of Ansible](https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#combining-hashes-dictionaries) is limited if it comes to nested elements that contain lists. The __recursive__ functionality only does merge dict elements but not nested list elements.
* The current implementation will simply take the second list as result.
* The expected results would be to merge both lists into a single list.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
Jinjia2 integration

##### ADDITIONAL INFORMATION
Example:
```yaml
---
- hosts: localhost
  gather_facts: false
  vars:
    foo:
      list:
      - a
      - b
      dict:
        foo: 1
    bar:
      list:
      - c
      - d
      dict:
        bar: 2
  tasks:
  - debug:
      msg: '{{ {} | combine(foo, bar, recursive=True) }}'
```

Expected:
```yaml
{
  "dict": {
      "bar": 2,
      "foo": 1
  },
  "list": [
      "a",
      "b",
      "c",
      "d"
  ]
}
```
Actual:
```yaml
{
  "dict": {
      "bar": 2,
      "foo": 1
  },
  "list": [
      "c",
      "d"
  ]
}
```

"""
    Internal convenience function to ensure arguments are MutableMappings
    This checks that all arguments are MutableMappings or raises an error
    :raises AnsibleError: if one of the arguments is not a MutableMapping
    """
    
    
    if not (isinstance(a, MutableMapping) and isinstance(b, MutableMapping)):
        myvars = []
        for x in [a, b]:
            try:
                myvars.append(dumps(x))
            except Exception:
                myvars.append(to_native(x))
        raise AnsibleError("failed to combine variables, expected dicts but got a '{0}' and a '{1}': \n{2}\n{3}".format(
            a.__class__.__name__, b.__class__.__name__, myvars[0], myvars[1])
        )
def combine_vars(a, b):
    """
    Return a copy of dictionaries of variables based on configured hash behavior
    """
    if C.DEFAULT_HASH_BEHAVIOUR == "merge":
        return merge_hash(a, b)
    else:
        
        _validate_mutable_mappings(a, b)
        result = a.copy()
        result.update(b)
        return result
def merge_hash(a, b):