Merge "Remove Centos Docker packer jobs"

diff --cc jjb/ci-management/ci-management-packer-jobs.yaml
index 5f7a6bd,888fe2a..04b2f36
--- 1/jjb/ci-management/ci-management-packer-jobs.yaml
--- 2/jjb/ci-management/ci-management-packer-jobs.yaml
+++ b/jjb/ci-management/ci-management-packer-jobs.yaml
@@@ -30,11 -30,9 +30,9 @@@
      archive-artifacts: '**/*.log'
  
      build-node: centos7-builder-2c-1g
 -    build-timeout: 60
 +    build-timeout: 90
  
      platforms:
-       - centos-7
-       - centos-7-arm64
        - ubuntu-16.04
        - ubuntu-18.04-arm64
      templates: docker