Relax rake backup regex to handle CE and EE RCs
The EE RC2 branch was failing due to a regex mismatch with 1494618360_2017_05_12_9.2.0-rc1-ee_gitlab_backup.tar
.
The EE RC2 branch was failing due to a regex mismatch with 1494618360_2017_05_12_9.2.0-rc1-ee_gitlab_backup.tar
.