Update git submodules

* Update docs/submodules/clamp.git from branch 'master'
  to 504422fe7b93714222ff53b9ee9914a26b74c091
  - Update SSL Certs and doc
    
    Update SSL certs for Frankfurt (expiry date Feb 2021) + fix clamp env
    for compose.
    Documentation updated to reflect what to do for cert renewal (readme).
    
    Issue-ID: CLAMP-641
    Signed-off-by: ChrisC <christophe.closset@intl.att.com>
    Change-Id: I24e24ee88674c3d5b399bc0f1722c61f4c54a937
    
1 file changed