##### SUMMARY

When state = replaced , 'no lacp port-priority' is appended to commands.  Hence , lacp port-priority is not getting set for the interface. 

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME

eos_lacp_interfaces.py

##### ANSIBLE VERSION
```
ansible 2.10.0.dev0
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/gosriniv/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/gosriniv/ansible/lib/ansible
  executable location = /home/gosriniv/ansible/bin/ansible
  python version = 3.6.5 (default, Sep  4 2019, 12:23:33) [GCC 9.0.1 20190312 (Red Hat 9.0.1-0.10)]


```

##### OS / ENVIRONMENT
arista eos


##### STEPS TO REPRODUCE

```

eos_lacp_interfaces:
      config:
        - name: Ethernet2
          port_priority: 55
          rate: fast
      state: replaced


```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS

'no lacp port-priority' should not be part of commands

##### ACTUAL RESULTS

```
changed: [10.8.38.32] => {
    "after": [
        {
            "name": "Ethernet2",
            "rate": "fast"
        }
    ],
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    },
    "before": [
        {
            "name": "Ethernet2",
            "port_priority": 45,
            "rate": "fast"
        }
    ],
    "changed": true,
    "commands": [
        "interface Ethernet2",
        "lacp port-priority 55",
        "no lacp port-priority"
    ],
    "invocation": {
        "module_args": {
            "config": [
                {
                    "name": "Ethernet2",
                    "port_priority": 55,
                    "rate": "fast"
                }
            ],
            "state": "replaced"
        }
    }
}

```

""" The command generator when state is merged
        :rtype: A list
        :returns: the commands necessary to merge the provided into
                  the current configuration
        """
        commands = []
        for key, desired in want.items():
            interface_name = normalize_interface(key)
            if interface_name in have:
                extant = have[interface_name]
            else:
                extant = dict()
            add_config = dict_diff(extant, desired)
            commands.extend(generate_commands(key, add_config, {}))
        return commands
    @staticmethod
    def _state_deleted(want, have):