Refactor task names for clarity and consistency across Icinga2 role

[lutin-malin]

Hi icinga team,
I've been trying to troubleshoot a deployment issue (only on my side) and ended up looking at your collection.
I found some improvments to be performed, so i took the freedom to give it a try.
Here you find my proposal.

In a nutshell, i have :

• moved all modules call to fqdn
• prefixed internal variables with __icinga2 to reduce its exposure to extern variable or any unwanted superseed
• implemented the argument_specs for role variable validation
• done some linting
• rearranged the defaults/vars where applicable.

I carefully bear attention to not touch the business logic being executed.

Also, this would be the 1st stone to build automated documentation for antsibull and ansible-doc. (cf #321 )

So far, i've done it only on the icinga2 role.
If this suits you, i could do further on the remaining roles.

Let me know your thoughts.

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Guillaume FAUVEL.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
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[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Guillaume FAUVEL.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Guillaume FAUVEL.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[lutin-malin]

@bobapple you can retrigger the cla-bot here as well

[bobapple]

@cla-bot check

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Guillaume FAUVEL.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[bobapple]

Seems like there's a misconfiguration in your git client. If you follow the steps from cla-bot you should be able to fix it.