[Marketplace] Deploy scripts and config

[yiyione]

Add marketplace deploy script in PAI
split marketplace to three component:

• marketplace-db
• marketplace-restserver
• marketplace-webportal

Each component can deploy independent.
Also add marketplace-restserver and marketplace-webportal to pylon.

[coveralls]

Coverage remained the same at 34.223% when pulling ac4e9a8 on yiyi/marketplace/deploy_update into acbec7b on master.

[debuggy]

how to change the version tag

[yiyione]

Test case:

1. Add marketplace config into services-configuration.yaml

cluster:
  common:
    marketplace: 'true'
marketplace-webportal:
  marketplace_api_uri: https://<pai-uri>/marketplace/api

2. build images:
   e.g. ./build/pai_build.py push -i marketplace-db marketplace-restserver marketplace-webportal -c /cluster-configuration/

3. restart service:
   ./paictl.py service stop -n marketplace-webportal marketplace-db marketplace-restserver
./paictl.py service start -n marketplace-webportal marketplace-db marketplace-restserver

4. check the deployment:

   • visit https://<pai-uri>/marketplace/api and get Welcome to marketplace!
   • visit https://<pai-uri>/marketplace/plugin.js and view the marketplace js file.
   • set https://<pai-uri>/marketplace/plugin.js to webportal plugin config, and visit the marketplace page.