Update docker entrypoint to support new database, state check and restore when start failed

[ysjiang4869]

Hi, I am develop vertica docker image for enterprise use. I find some problems and fix it.

1. Merge dev docker-entrypoint.sh with master branch
2. Add vertica running state check
3. Add start timeout env suopport
4. For single vertica, use wos may case database crash when lastgoodepoch is slow than current epoch, add recorvery function if start failed
5. Ff you change the database name via env, it will create new database instead of throw error before

The script was fully test, hope can help impove.