Add bookkeeper client support

[zymap]

Motivation

I have submitted the pr about supporting bookie commands. Because the project structure makes a big change and there are too many conflicts, I need to refactor base on the master. I will close #83 #86 #89 and reopen a new pr.

Issue

Currently, Pulsarctl only support sends a request to Pulsar service. So the HTTP client is bind with Pulsar client. We need to separate the HTTP client and the Pulsar Admin client. Then the HTTP client can be used in both Pulsar and BookKeeper clients.

I will send several pull requests to complete this work.

• Separate HTTP client and Pulsar Admin client. [BK-SUPPORT-PART-1] Separate HTTP client and admin client #132
• Add bookie commands
  • ledger [BK-SUPPORT-PART-2] Support bookkeeper ledger commands #134
  • bookies [BK-SUPPORT-PART-3] Support bookkeeper bookie commands #135
  • autorecovery [BK-SUPPORT-PART-4] Support bookkeeper autorecovery commands #136