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##### SUMMARY
<!--- Explain the problem briefly below -->
Unit tests for ios_interfaces is failing, with import error

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ios_interfaces
##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
devel
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
macos

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

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##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
Unit tests for `ios_interfaces` should pass w/o any issue/failure

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
Unit tests are failing with error: `ImportError: cannot import name 'dict_diff' from 'ansible.module_utils.network.ios.utils.utils'`
<!--- Paste verbatim command output between quotes -->
```paste below

```

"""Gets the type of interface
    """
    if interface.upper().startswith('GI'):
        return 'GigabitEthernet'
    elif interface.upper().startswith('TE'):
        return 'TenGigabitEthernet'
    elif interface.upper().startswith('FA'):
        return 'FastEthernet'
    elif interface.upper().startswith('FO'):
        return 'FortyGigabitEthernet'
    elif interface.upper().startswith('LON'):
        return 'LongReachEthernet'
    elif interface.upper().startswith('ET'):
        return 'Ethernet'
    elif interface.upper().startswith('VL'):
        return 'Vlan'
    elif interface.upper().startswith('LO'):
        return 'loopback'
    elif interface.upper().startswith('PO'):
        return 'port-channel'
    elif interface.upper().startswith('NV'):
        return 'nve'
    elif interface.upper().startswith('TWE'):
        return 'TwentyFiveGigE'
    elif interface.upper().startswith('HU'):
        return 'HundredGigE'
    else:
        return 'unknown'