Extract Firebird database tasks.
Extract Sqlserver database tasks.
Extract Oracle database tasks.
Add deprecation message on Firebird / Sqlserver / Oracle database tasks.
Suppress deprecation messages for deprecated database tasks, when executing rails's testcases.
Fix tiny problem: change method order for consistency and fix wrong method name.
Show deprecated messages only when target database adapters defined
Add CHANGELOG entry about extracting and deprecating Firebird/Sqlserver/Oracle database tasks.
Merge pull request #9971 from kennyj/refactor_tasks

Extract Firebird / Sqlserver / Oracle database tasks, and They should be deprecated.