latest strings from zanata
Merge pull request #556 from candlepin/alikins/zanata_2014_4_8

latest strings from zanata
1065369: Use Hibernate Validation to supersede database error reporting.

Current violations of 'not null' and size constraints result in runtime errors.
Hibernate validation checks annotated fields prior to database interaction.
Merge pull request #557 from candlepin/wottop/hibernate-validator

1065369: Use Hibernate Validation to supersede database error reporting.
Automatic commit of package [candlepin] release [0.9.9-1].
remove F18 from katello-koji
bump candlepin-deps
model source subscription
add migration to the liquibase script

Use a liquibase custom task update to fix bad data prior
to moving to the table with constraints.