Add user data replace feature

[tirumerla]

what

• Allow flexibility to destroy and recreate ec2 instances when user data changes. See user_data_replace_on_change option
• Not sure if this is backwards compatible, I'm testing on >=4.7.0 aws provider version.

why

• Allow flexibility to destroy and recreate ec2 instances when user data changes.

references

• Fixes #132

[woz5999]

I think this duplicates https://github.com/cloudposse/terraform-aws-ec2-instance/pull/123

[tirumerla]

I think this duplicates #123

Oops, that's right. Please let me know if i should close this and wait for the other PR to be merged. If not this PR can go in if you think other one might take little longer.

[woz5999]

co-author of #123 here. we're ready willing and able to push that through if/when the maintainers are ready. also happy to cede to this MR. let us know how we can help.

[mergify[bot]]

This pull request is now in conflict. Could you fix it @tirumerla? 🙏

[mergify[bot]]

This PR has been closed due to inactivity and merge conflicts. Please resolve the conflicts and reopen if necessary.

[mergify[bot]]

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