(move duplicate code into it)

The implementation is incomplete and thus not used anywhere other than the test

still a lot of things to do

and JetControlFlowDataTraceFactory

In the most places in frontend identifier is stored in Name class, was in String.
Name has two advantages over String:
* validation: you cannot accidentally create identifier with dot, for example
* readability: if you see String, you don't now whether it is
  identifier, fq name, jvm class name or something else

Name's disadvantage is (small) performance overhead. We have no value types in JVM.

It is just prototype

* does not make top level symbols visible as class members yet
* does not take parameters
* Script class name is hardcoded now

move classBuilderMode to injector and GenerationState from ClassBuilder

Holds reference to runtime.jar and jdk-headers.jar. Paths to these
jars are no longer hardcoded.

Many tests now compile runtime before execution. Because of this:
* Single test invocation is significantly slower now for some tests
* This can be fixed by making tests independent from runtime (this
must be done anyway)

Some tests still depend on runtime.jar built by "ant dist", this
is to be fixed.

used in JetTypeMapper in JetTypeMapper

* MapTypeMode contains no information not needed by JetTypeMapper
* MapTypeMode has separate VALUE and IMPL values that are needed to compile builtins

* do not include anything when compiling builtins
* do not include kotlin-runtime and jdk-headers when compiling jdk-headers

* cleanup after yesterday
* remove BindingContext stack in GenerationState
* use more power and strength of di

TODO: also initialize GenerationState by DI

(JavaNamespaceDescriptor will be killed soon, NamespaceFactory will be used to create nss)

It is necessary to make NamespaceFactoryImpl independent from TopDownAnalysisContext

JavaDescriptorResolver now lives in the same context as TopDownAnalyzer

* required parameters have @NotNull annotation generated
* parameters are required by default

* ModuleDescrpiptor now lives in context
* ns parent is module descriptor iff ns is root ns
* minor test enhancements