*** This bug has been marked as a duplicate of bug 754425 ***

This one's for the server side changes. the other is for client.

fixed in b2c4f25b01ca07592

Verifying Version...
[root@jsefler-f14-5candlepin candlepin]# git branch
  0.2
  0.3
  0.4
* master
[root@jsefler-f14-5candlepin candlepin]# git show-ref | grep master
a772fdaa900260a49ddce9fb43a413c10345739d refs/heads/master
a772fdaa900260a49ddce9fb43a413c10345739d refs/remotes/origin/master
[root@jsefler-onprem-5server ~]# rpm -q subscription-manager
subscription-manager-0.98.9-1.git.0.ca56fd1.el5_7


Reference: https://docspace.corp.redhat.com/docs/DOC-30244
Once upon a time the OID structure of a content namespace was the following:
1.3.6.1.4.1.2312.9.2.<content_hash>.1 (Yum repo type))
1.3.6.1.4.1.2312.9.2.<content_hash>.1.1 (Name)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.2 (Label)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.3 (Physical Entitlements)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.4 (Flex Guest Entitlements)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.5 (Vendor ID)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.6 (Download URL)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.7 (GPG Key URL)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.8 (Enabled)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.9 (Metadata Expire Seconds)
1.3.6.1.4.1.2312.9.2.<content_hash>.1.10 (Required Tags)

^^^ Notice the *.1.4 (Flex Guest Entitlements) OID.

For verification, I have subscribed to a pool and have been granted an entitlement.  Let's use openssl to see the contents of the entitlement and verify the Flex Guest Entitlements OID has been removed...

[root@jsefler-onprem-5server ~]# openssl x509 -text -in /etc/pki/entitlement/2964798287279585223.pem | grep -A1 1.3.6.1.4.1.2312.9.2
            1.3.6.1.4.1.2312.9.2.0.1: 
                ..yum
            1.3.6.1.4.1.2312.9.2.0.1.1: 
                ..never-enabled-content
            1.3.6.1.4.1.2312.9.2.0.1.2: 
                ..never-enabled-content
            1.3.6.1.4.1.2312.9.2.0.1.5: 
                ..test-vendor
            1.3.6.1.4.1.2312.9.2.0.1.6: 
                ../foo/path/never
            1.3.6.1.4.1.2312.9.2.0.1.7: 
                ../foo/path/never/gpg
            1.3.6.1.4.1.2312.9.2.0.1.8: 
                ..0
            1.3.6.1.4.1.2312.9.2.0.1.9: 
                ..600
            1.3.6.1.4.1.2312.9.2.1.1: 
                ..yum
            1.3.6.1.4.1.2312.9.2.1.1.1: 
                ..always-enabled-content
            1.3.6.1.4.1.2312.9.2.1.1.2: 
                ..always-enabled-content
            1.3.6.1.4.1.2312.9.2.1.1.5: 
                ..test-vendor
            1.3.6.1.4.1.2312.9.2.1.1.6: 
                ../foo/path/always
            1.3.6.1.4.1.2312.9.2.1.1.7: 
                ../foo/path/always/gpg
            1.3.6.1.4.1.2312.9.2.1.1.8: 
                ..1
            1.3.6.1.4.1.2312.9.2.1.1.9: 
                ..200
            1.3.6.1.4.1.2312.9.2.2.1: 
                ..yum
            1.3.6.1.4.1.2312.9.2.2.1.1: 
                ..tagged-content
            1.3.6.1.4.1.2312.9.2.2.1.2: 
                ..tagged-content
            1.3.6.1.4.1.2312.9.2.2.1.5: 
                ..test-vendor
            1.3.6.1.4.1.2312.9.2.2.1.6: 
                ../foo/path/always
            1.3.6.1.4.1.2312.9.2.2.1.7: 
                ../foo/path/always/gpg
            1.3.6.1.4.1.2312.9.2.2.1.8: 
                ..1
            1.3.6.1.4.1.2312.9.2.2.1.10: 
                ..TAG1,TAG2
            1.3.6.1.4.1.2312.9.2.1111.1: 
                ..yum
            1.3.6.1.4.1.2312.9.2.1111.1.1: 
                ..content
            1.3.6.1.4.1.2312.9.2.1111.1.2: 
content-label   .
            1.3.6.1.4.1.2312.9.2.1111.1.5: 
                ..test-vendor
            1.3.6.1.4.1.2312.9.2.1111.1.6: 
                ../foo/path
            1.3.6.1.4.1.2312.9.2.1111.1.7: 
                ../foo/path/gpg/
            1.3.6.1.4.1.2312.9.2.1111.1.8: 
                ..1
            1.3.6.1.4.1.2312.9.2.1111.1.9: 
                ..0
[root@jsefler-onprem-5server ~]# 

^^^ VERIFIED. The 1.4 (Flex Guest Entitlements) OID is not present in any of these content namespaces.