provider/openstack: Force Deletion of Instances

[jtopjian]

This commit adds the force_delete argument, enabling instances
to be forcefully deleted.

For #12674
Fixes #5104

/cc @cloudrkt

[stack72]

Hey @jtopjian

Be aware that, if this resource supports import, then there will be a diff in the test as this value isn't set to state :)

P.

[jtopjian]

@stack72 Ahh thanks. Instances aren't able to be imported yet (hopefully soon, though!)

What would be the best way to handle this in the future, though?

[stack72]

if you look at the custom import function on aws_db_instance you can see how we set the defaults :)

[jtopjian]

Do you mean how the fields listed in import_aws_db_instance_test.go are ignored or the DiffSuppressFunc?

[stack72]

Look at this

Importer: &schema.ResourceImporter{
			State: resourceAwsDbInstanceImport,
		},

[jtopjian]

Ah - gotcha. Thank you! OK, that's really good to know. Might apply to some other areas, too. :)

[ghost]

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