New upstream version 2.8.6

.travis.yml

plexus-compiler-api/pom.xml

plexus-compiler-manager/pom.xml

plexus-compiler-test/pom.xml

...va/org/codehaus/plexus/compiler/AbstractCompilerTest.java

plexus-compilers/plexus-compiler-aspectj/pom.xml

...ava/org/codehaus/plexus/compiler/ajc/AspectJCompiler.java

...org/codehaus/plexus/compiler/ajc/AspectJCompilerTest.java

plexus-compilers/plexus-compiler-csharp/pom.xml

...s/plexus/compiler/csharp/DefaultCSharpCompilerParser.java

plexus-compilers/plexus-compiler-eclipse/pom.xml

...codehaus/plexus/compiler/eclipse/EclipseJavaCompiler.java

plexus-compilers/plexus-compiler-j2objc/pom.xml

plexus-compilers/plexus-compiler-javac-errorprone/pom.xml

plexus-compilers/plexus-compiler-javac/pom.xml

...ava/org/codehaus/plexus/compiler/javac/JavacCompiler.java

...haus/plexus/compiler/javac/AbstractJavacCompilerTest.java

...odehaus/plexus/compiler/javac/ErrorMessageParserTest.java

plexus-compilers/plexus-compiler-jikes/pom.xml

plexus-compilers/pom.xml