alpine build, implement to follow VNF anisble Req

1. change from ubuntu build to alpine build
2, follow the dir path for playbook - pls see JIRA

Change-Id: Iaa2f7e3c9fc66542b1bc0751826821276f773efa
Issue-ID: CCSDK-1009
Signed-off-by: Taka Cho <takamune.cho@att.com>
9 files changed