An exclusion rule is a Rule that when matched, causes the resource to be excluded from being matched against any other cleanup rules. It enables a resource to be "Opted Out" of cleanup.

A TagValueExclusionRule is included in this PR which excludes any resource that has a specified tag and value.

TagValueExclusionRule is disabled by default and is enabled by setting the following property:

simianarmy.janitor.rule.TagValueExclusionRule.enabled=true

The TagValueExclusionRule is configured with two properties:

simianarmy.janitor.rule.TagValueExclusionRule.tags=
simianarmy.janitor.rule.TagValueExclusionRule.values=

The first property specifies the tags that invoke the exclusion rules and he second property specifies the values. For example, to exclude any resource tagged with "expiration_time=never" use this configuration:

simianarmy.janitor.rule.TagValueExclusionRule.enabled=true
simianarmy.janitor.rule.TagValueExclusionRule.tags=expiration_time
simianarmy.janitor.rule.TagValueExclusionRule.values=never

Another example: to exclude any resource tagged with "expiration_time=never" or "optout=true" use this configuration

simianarmy.janitor.rule.TagValueExclusionRule.enabled=true
simianarmy.janitor.rule.TagValueExclusionRule.tags=expiration_time,optout
simianarmy.janitor.rule.TagValueExclusionRule.values=never,true