26f483 Only check for REDHAT_SUPPORT_PRODUCT and REDHAT_SUPPORT_PRODUCT_VERSION on EL7

Authored and Committed by Brian Stinson 4 years ago
    Only check for REDHAT_SUPPORT_PRODUCT and REDHAT_SUPPORT_PRODUCT_VERSION on EL7
    
    We removed these fields in CentOS Linux 8
    
    Signed-off-by: Brian Stinson <bstinson@centosproject.org>