<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
The ios_banner currently strips any text passed to it, making certain banner formats impossible to replicate properly.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ios_banner

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Add a boolean switch to the module params (`strip`, perhaps) that would conditionally strip or not the text passed from the param. Could be optional and default to `True`.

<!--- Paste example playbooks or commands between quotes below -->
```yaml
ios_banner:
  strip: no
  banner: login
  present: yes
  text: "{{ lookup('template', 'banner.j2') }}"
```
with the `banner.j2` looking like
```
            WARNING
This is a private system if you
do not belong here, bugger off
or something.
```
<!--- HINT: You can also paste gist.github.com links for larger files -->

commands = list()
    want, have = updates
    state = module.params['state']
    if state == 'absent' and 'text' in have.keys() and have['text']:
        commands.append('no banner %s' % module.params['banner'])
    elif state == 'present':
        if want['text'] and (want['text'] != have.get('text')):
            banner_cmd = 'banner %s' % module.params['banner']
            banner_cmd += ' @\n'
            banner_cmd += want['text'].strip()
            banner_cmd += '\n@'
            commands.append(banner_cmd)
    return commands
def map_config_to_obj(module):