v224

Sec:

• Bump Ubuntu stemcells for [USN-2810-1] Kerberos vulnerabilities
• Stemcell hardening additions:
  V-38526,
  V-38524,
  V-38529,
  V-38523,
  V-38613,
  V-38484

Fixes:

• Fixed DNS configuration for multi-homed VMs

This release includes 3137 stemcell series.