Added DEA to Diego migration script
Added DEA to Diego migration script

[delivers #105862514]

Signed-off-by: Kai Xiang <987005552a526059a0c9b4b70d166beabef8374e@pivotal.io>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release