<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### 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

```

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

##### 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

```

#  no ip address
#  duplex auto
#  speed 1000
# interface GigabitEthernet0/3
#  mtu 2000
#  no ip address
#  shutdown
#  duplex full
#  speed 100
- name: Replaces device configuration of listed interfaces with provided configuration
  ios_interfaces:
    config:
      - name: GigabitEthernet0/3
        description: 'Configured and Replaced by Ansible Network'
        enabled: False
        duplex: auto
        mtu: 2500
        speed: 1000
    state: replaced
# After state:
# -------------
#
# vios#show running-config | section ^interface
# interface GigabitEthernet0/1
#  no ip address
#  duplex auto
#  speed auto
# interface GigabitEthernet0/2
#  description Configured by Ansible Network
#  no ip address