yum update fails with subscription-manager dependencies.

Issue

• yum update fails with below error when version locked to 7.5 or lower and the extras repository (rhel-7-server-extras-rpms) is enabled.

  # yum update
  Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
  Resolving Dependencies
  --> Running transaction check
  ---> Package python-rhsm.x86_64 0:1.19.10-1.el7_4 will be obsoleted
  ---> Package python-rhsm-certificates.x86_64 0:1.19.10-1.el7_4 will be obsoleted
  ---> Package subscription-manager.x86_64 0:1.19.23-1.el7_4 will be updated
  ---> Package subscription-manager.x86_64 0:1.21.10-2.el7 will be an update
  --> Processing Dependency: python-dmidecode >= 3.12.2-2 for package: subscription-manager-1.21.10-2.el7.x86_64
  --> Processing Dependency: python-inotify for package: subscription-manager-1.21.10-2.el7.x86_64
  ---> Package subscription-manager-rhsm.x86_64 0:1.21.10-2.el7 will be obsoleting
  ---> Package subscription-manager-rhsm-certificates.x86_64 0:1.21.10-2.el7 will be obsoleting
  --> Running transaction check
  ---> Package python-inotify.noarch 0:0.9.4-4.el7 will be installed
  ---> Package subscription-manager.x86_64 0:1.21.10-2.el7 will be an update
  --> Processing Dependency: python-dmidecode >= 3.12.2-2 for package: subscription-manager-1.21.10-2.el7.x86_64
  --> Finished Dependency Resolution
  Error: Package: subscription-manager-1.21.10-2.el7.x86_64 (rhel-7-server-extras-rpms)
             Requires: python-dmidecode >= 3.12.2-2
             Installed: python-dmidecode-3.12.2-1.1.el7.x86_64