Add a warning if two plugins have the same settings partial name (#14008).

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013336
Add ability to define plugins' gem dependencies in PluginGemfile (#14030).

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013337
fix test failure on Ruby 1.8.7 PostgreSQL (#17484)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013338