Prohibit instantiation of annotation classes
  #KT-3465 Fixed
Check annotations on anonymous intializers
 #KT-2208 Fixed
Add warning when 'val' keyword on annotation parameter is missing
 #KT-1900
Annotations inheritance. Either prohibit or implement correctly  #KT-3225 Fixed
Add tests for usage of java annotation with default arguments
 Add gradle-plugin-core folder to exclude of JetConformanceTest
Make unary minus and unary plus return int for byte and short
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