1) Add centos node extension 2) add helper to build iso with settings for booting centos master node 3) add unit tests Change-Id: I30f1914fd4516bda9538a3de590c027d07cd334a Implements blueprint: master-node-installation-as-devops-extension
1) Add centos node extension 2) add helper to build iso with settings for booting centos master node 3) add unit tests Change-Id: I30f1914fd4516bda9538a3de590c027d07cd334a Implements blueprint: master-node-installation-as-devops-extension