Fix debug process

[diafour]

Part 1

• Remove --debug=yes flag
• Remove disableDebug parameter in onKubernetesEvent binding
• Migrate to logrus library
  • json logs
  • timestamps
  • custom log format

Part 2

• Remove files in /tmp after hook run
• debug over http: binding_context file, hook output for each hook run
• add settings for two endpoints: debug and metrics. DEBUG_LISTEN_ADDRESS, LISTEN_ADDRESS.
  • LISTEN_ADDRESS=:9115 — current setting — listen on 0.0.0.0 on 9115 port
  • LISTEN_ADDRESS=127.0.0.1:9115 — listen on localhost

Update 22.01.2020:

• Part 1 is done mostly in PR JSON logs #62
• Remove tmp files is done in fix: make temp files unique and clean them after hook execution #100

[diafour]

A specification for debug endpoint:

• use unix socket /var/run/shell-operator/debug.socket
• endpoints:
  • /debug/queue.json
  • /debug/queue.yaml
  • /debug/queue — text representation
• add cli command debug into shell-operator binary:
  • shell-operator debug queue [-o yaml|json]
• do not forget that addon-operator will include more endpoints and sub-commands for values!

[diafour]

Refined cli spec:

addon-operator queue list  [-o yaml|json] — list all available queues with their sizes
addon-operator queue dump  [-o yaml|json] — dump queues and their tasks
addon-operator queue task list <q-name> — dump tasks in one queue
addon-operator queue task drop <q-name> <task-id> — drop queued task
addon-operator queue task drop-all <q-name> — drop all tasks from queue
addon-operator log level — return current log level
addon-operator log level --set debug — set log level in runtime

[diafour]

Done in #105. Next step is #101