Rails4: replace deprecated Relation#first with finder options at AttachmentTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012500
Rails4: replace deprecated Relation#first with finder options at AccountControllerOpenidTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012501
Rails4: replace deprecated Relation#update_all at Message model

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012502
Rails4: replace deprecated Relation#update_all at Board model

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012503
Rails4: replace deprecated Relation#update_all at acts_as_list

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012504