<!--- 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 -->

self.exec_command.return_value = (0, load_fixture('ios_banner_show_banner.txt').strip(), None)
        self.load_config.return_value = dict(diff=None, session='session')
    def test_ios_banner_create(self):
        for banner_type in ('login', 'motd', 'exec', 'incoming', 'slip-ppp'):
            set_module_args(dict(banner=banner_type, text='test\nbanner\nstring'))
            commands = ['banner {0} @\ntest\nbanner\nstring\n@'.format(banner_type)]
            self.execute_module(changed=True, commands=commands)
    def test_ios_banner_remove(self):
        set_module_args(dict(banner='login', state='absent'))
        commands = ['no banner login']
        self.execute_module(changed=True, commands=commands)
    def test_ios_banner_nochange(self):
        banner_text = load_fixture('ios_banner_show_banner.txt').strip()
        set_module_args(dict(banner='login', text=banner_text))
        self.execute_module()
class TestIosBannerIos12Module(TestIosBannerModule):
    def load_fixtures(self, commands):
        show_banner_return_value = (1, '', None)
        show_running_config_return_value = \
            (0, load_fixture('ios_banner_show_running_config_ios12.txt').strip(), None)
        self.exec_command.side_effect = [show_banner_return_value,
                                         show_running_config_return_value]
    def test_ios_banner_nochange(self):
        banner_text = load_fixture('ios_banner_show_banner.txt').strip()
        set_module_args(dict(banner='exec', text=banner_text))
        self.execute_module()