Support null value in access_log_bucket_name condition #64

Job	Run time
terraform-module / CI / Labels Validate	4s
terraform-module / CI / bats	37s
terraform-module / CI / Format HCL	21s
terraform-module / CI / Find modules	3s
terraform-module / CI / Validate Codeowners (syntax)	7s
terraform-module / Readme	0s
terraform-module / CI / Validate Codeowners (owners)	0s
terraform-module / CI / Lint (./examples/complete)	22s
terraform-module / CI / Lint (.)	20s
terraform-module / ci	3s
terraform-module / Release	0s
	1m 57s

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