<!--- 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 -->

running Cisco IOS.  It allows playbooks to add or remote
    banner text from the active running configuration.
extends_documentation_fragment: ios
notes:
  - Tested against IOS 15.6
options:
  banner:
    description:
      - Specifies which banner should be configured on the remote device.
        In Ansible 2.4 and earlier only I(login) and I(motd) were supported.
    required: true
    choices: ['login', 'motd', 'exec', 'incoming', 'slip-ppp']
  text:
    description:
      - The banner text that should be
        present in the remote device running configuration.  This argument
        accepts a multiline string, with no empty lines. Requires I(state=present).
  state:
    description:
      - Specifies whether or not the configuration is
        present in the current devices active running configuration.
    default: present
    choices: ['present', 'absent']
"""
EXAMPLES = """
- name: configure the login banner
  ios_banner:
    banner: login
    text: |
      this is my login banner