Bumping centos os imade epel release package from epel-release-7-5.noarch.rpm to epel-release-7-6.noarch.rpm
Bumping centos os imade epel release package from epel-release-7-5.noarch.rpm to epel-release-7-6.noarch.rpm

[#117854063](https://www.pivotaltracker.com/story/show/117854063)

Signed-off-by: Kam Leung <bbd6ea552864be24bc8b0a608253fbbecfbc9c10@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh