CLDSRV-847: don't require x-amz-content-sha256 to be signed#6078

bert-e merged 3 commits intodevelopment/9.2scality/cloudserver:development/9.2from

bugfix/CLDSRV-847-dont-require-x-amz-content-sha256-to-be-signedscality/cloudserver:bugfix/CLDSRV-847-dont-require-x-amz-content-sha256-to-be-signedCopy head branch name to clipboard