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

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012505
Rails4: replace deprecated Relation#first with finder options at BoardsControllerTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012506
Rails4: replace deprecated Relation#first with finder options at DocumentsControllerTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012507
Rails4: replace deprecated Relation#first with finder options at GroupsControllerTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012508
Rails4: replace deprecated Relation#first with finder options at IssueCategoriesControllerTest

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012509