This commit introduces some new methods into the
runtime Factory class and modifies code generation
to use them (and to use the form of the LDC bytecode
that loads class constants).

The version handling in LangUtil has been overhauled
to cope better with post 1.8 releases (JDK9 and JDK10 or 18.3
or whatever they call it). As part of this moved
to treating JDK9 as '9' rather than '1.9'. Also removed
duplicate version processing logic and had that defer to
the one place in LangUtil where we now deal with it.

Includes some generics tidyup in ajdoc. More ajdoc work
is necessary for Java10 because it removes the standard doclet
(old style). However trying to invoke the internal Javadoc
handler in Java10 is failing due to module visibility rules.

Compile error: ClassCastException thrown: org.aspectj.weaver.MissingResolvedTypeWithKnownSignature cannot be cast to ReferenceType

Multiple changes here:
- annotation unpacking is smarter and if it only needs runtime
  retention annotations it uses reflection and doesn't unpack the
  bytes to discover class level retention annotations.
- Reflection worlds are shared if for the same classloader.

I don't want to change that code until I see more evidence of it
misbehaving but I'm having trouble working out why it is there!

New Xset option generateNewLocalVariableTables defaults to true
but can be set to false. In some situations incoming bytecode
for weaving doesn't want them adding (e.g. android situations
where the bytecode is a bit funky).

Issue: https://bugs.eclipse.org/bugs/show_bug.cgi?id=470658

1.8.6 release prep
1.8.6 pom updates
Fix rogue chars in javadoc
rebuilt with javadoc fixes

Modified test expectation system so it is possible to say
the test cares about one particular message and the rest
do not matter (prefix message string with '*') - crude but
quick.

Polished many places to exploit generics

Upgraded all the tests to work on Java8 - some serious changes
regarding ajdoc on Java8. Hopefully it has stayed backwards
compatible with earlier JDK versions (e.g. if using AspectJ 1.8.3+
with a JDK less than 8) but no explicit testing done for this.

Issue: 407739

https://bugs.eclipse.org/bugs/show_bug.cgi?id=407494

Added 1.7.3 test suite