Add description of cleanup-metadata-if-dedicated-disabled errand to README
Add description of cleanup-metadata-if-dedicated-disabled errand to
README

[#159861334]

Signed-off-by: Sarah Connor <df3768d6ee4349d41e20c7bd8dfa6947d0a1c2b9@pivotal.io>

pivotal-cf/cf-redis-release,pivotal-cf/cf-redis-release,pivotal-cf/cf-redis-release