Fix postgres persistence and upgrade bolt library

[josejuanmontiel]

Hi, first thanks for developing and sharing this project.

We are using with postgres 10.6, and we notice some problems

• First when trying to delete (don't have now the message) it's fail because "job -> 'id'" has documented here '{"a": {"b":"foo"}}'::json->'a' gives {"b":"foo"} and we need filter by the id of the job... '{"a":1,"b":2}'::json->>'b' that give 2. We replace > with >> in get and delete
• Second, save need check if exist, to update either to insert (as diferent as mysql where can use replace, hear postgres/json)

If i have more time, i'll make another PR with https://github.com/ory/dockertest for testing.

Thanks again

[josejuanmontiel]

Hi, i get time for this... the error where

&pq.Error{Severity:"ERROR", Code:"22P02", Message:"invalid input syntax for type json", Detail:"Token \"0ce70361\" is invalid.", Hint:"", Position:"", InternalPosition:"", InternalQuery:"", Where:"JSON data, line 1: 0ce70361...", Schema:"", Table:"", Column:"", DataTypeName:"", Constraint:"", File:"json.c", Line:"1248", Routine:"report_invalid_token"} i upload the integration test (flaged with integration) job/storage/postgres/postgres_int_test.go

[josejuanmontiel]

In addition... i'll use this branch to include job InitDelayDuration in GetAll, because without this... when kala restart with postgres persistence, jobs doesn't start... which doesn't happen in mysql (code copied and refactor for json table)

[josejuanmontiel]

Seem that when the test works again in circleci https://issueexplorer.com/issue/hashicorp/raft-boltdb/21 this library is a bit older... upgrade library boltdb/bolt with go.etcd.io/bbolt

[josejuanmontiel]

@tooolbox or @ajvb now all green :) https://app.circleci.com/pipelines/github/ajvb/kala/97/workflows/f37a0256-1ee3-48a9-baf1-aafb2bc8ae9f/jobs/509