Fix missing property 'bukkitVersion' in Gradle 2.x
Fix missing property 'bukkitVersion' in Gradle 2.x

Signed-off-by: Steven Downer <e51bce9123e792aec8a98724fb48684dc936521f@outlook.com>

kukrimate/Glowstone,Postremus/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,BlazePowered/Blaze-Server,Tonodus/GlowSponge,GlowstonePlusPlus/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,keke142/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,Tonodus/GlowSponge,Tonodus/WaterGleam,BlazePowered/Blaze-Server,Tonodus/GlowSponge,jimmikaelkael/GlowstonePlusPlus,kukrimate/Glowstone,GlowstonePlusPlus/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,GlowstonePlusPlus/GlowstonePlusPlus,keke142/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,Tonodus/WaterGleam,LukBukkit/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,kukrimate/Glowstone,GlowstoneMC/GlowstonePlusPlus,Postremus/GlowstonePlusPlus,BlazePowered/Blaze-Server,keke142/GlowstonePlusPlus,Tonodus/WaterGleam,GlowstonePlusPlus/GlowstonePlusPlus,BlazePowered/Blaze-Server,Tonodus/WaterGleam,Postremus/GlowstonePlusPlus,kukrimate/Glowstone,Tonodus/GlowSponge,Postremus/GlowstonePlusPlus,keke142/GlowstonePlusPlus