updating check against root as emphemeral instead of /var/vcap/data
updating check against root as emphemeral instead of /var/vcap/data

[#145971959]

Signed-off-by: Johanna Smith <2fc3028b35264835a509c10d755513fc3ce1357b@pivotal.io>

cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release