Changed Enumerations to use a Single Table Inheritance

* Added migrations to change Enumerations to an STI relationship
* Added TimeEntryActivity model (STI)
* Added DocumentCategory model (STI)
* Added IssuePriority model (STI)
* Added Enumeration#get_subclasses to get a list of the subclasses of Enumeration
* Changed Enumeration to use the STI type field instead of the opt field
* Changed Enumeration#opt to return the old opt values but with a deprecation warning.
* Removed Enumeration::OPTIONS
* Removed the dynamic named_scopes in favor of specific named_scopes.  Kept for
  compatibility reasons.
* Added Enumeration#default so each subclass can easily find it's default record.
* Fixed Enumeration#default to use the STI scoping with a fake default scope for finding Enumeration's default.
* Added a 'all' named scope for getting all records in order by position.
* Added Deprecation warnings to the old named_scopes in Enumerations.
* Moved various methods off of Enumeration and onto the concrete classes
* Changed the EnumerationsController to use types
* Updated the Enumeration list template
* Added has_many relationships to the Enumeration STI classes.
* Fixes for tests.

  #3007

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2777 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/fixtures/enumerations.yml

@@ -3,46 +3,67 @@ enumerations_001:
   name: Uncategorized
   id: 1
   opt: DCAT
+  type: DocumentCategory
 enumerations_002: 
   name: User documentation
   id: 2
   opt: DCAT
+  type: DocumentCategory
 enumerations_003: 
   name: Technical documentation
   id: 3
   opt: DCAT
+  type: DocumentCategory
 enumerations_004: 
   name: Low
   id: 4
   opt: IPRI
+  type: IssuePriority
 enumerations_005: 
   name: Normal
   id: 5
   opt: IPRI
+  type: IssuePriority
   is_default: true
 enumerations_006: 
   name: High
   id: 6
   opt: IPRI
+  type: IssuePriority
 enumerations_007: 
   name: Urgent
   id: 7
   opt: IPRI
+  type: IssuePriority
 enumerations_008: 
   name: Immediate
   id: 8
   opt: IPRI
+  type: IssuePriority
 enumerations_009: 
   name: Design
   id: 9
   opt: ACTI
+  type: TimeEntryActivity
 enumerations_010: 
   name: Development
   id: 10
   opt: ACTI
+  type: TimeEntryActivity
   is_default: true
 enumerations_011: 
   name: QA
   id: 11
   opt: ACTI
-  
+  type: TimeEntryActivity
+enumerations_012:
+  name: Default Enumeration
+  id: 12
+  opt: ''
+  type: Enumeration
+  is_default: true
+enumerations_013:
+  name: Another Enumeration
+  id: 13
+  opt: ''
+  type: Enumeration

test/fixtures/issues.yml

@@ -95,7 +95,7 @@ issues_007:
   created_on: <%= 10.days.ago.to_date.to_s(:db) %>
   project_id: 1
   updated_on: <%= 10.days.ago.to_date.to_s(:db) %>
-  priority_id: 3
+  priority_id: 5
   subject: Issue due today
   id: 7
   fixed_version_id: 
@@ -112,7 +112,7 @@ issues_008:
   created_on: <%= 10.days.ago.to_date.to_s(:db) %>
   project_id: 1
   updated_on: <%= 10.days.ago.to_date.to_s(:db) %>
-  priority_id: 3
+  priority_id: 5
   subject: Closed issue
   id: 8
   fixed_version_id: