8078561: Error message should be generated once when -source 6 is specified
Summary: Code to avoid duplicated errors about features not supported in the current source level moved to Log
Reviewed-by: jjg
Ambig3.java:14:14: compiler.err.name.clash.same.erasure: check(E), check(T)
Ambig3.java:20:1: compiler.err.concrete.inheritance.conflict: check(E), Test<java.lang.String,java.lang.String>, check(T), Test<java.lang.String,java.lang.String>, Test<java.lang.String,java.lang.String>
2 errors