Reintegrate Format and Check DSLs developments and builder improvements

[rmitin]

Reintegrate recent development on Format and Check DSLs as well as the builder basics.

With #3 introduce new features and fixes for Check DSL, Format DSL and the builder.

New features

Extension properties for checks implemented with Check DSL

One can now externall contribute properts for checks which are orthogonal to check definitions themselves. Check configurations then allow setting these properties per check. As an example, if you want to be able to makr your checks as integration blocking, then you can add a property "integration blocking" which is then possible to configure for all checks within a check configuration file.

To register extended properties an extension point "property" in CheckCfg is introduced. Consumers are expected to supply an implementation of the provided ICheckCfgPropertySpecification interface.

Improved no_format handling and support for DSLs with pre-processor

• no_format rules now can be also defined 'between' elements
• nested no_format rules are correctly handled
• 'around' no_format rules now are enforced before the element to be left unformatted, inside it and after it
• Support for languages with pre-processor statements added to the runtime of Format DSL. That is you can now define handling of pre-processor instructions in your DSL when implementing formatter for your DSL using the Format DSL

Builder allow additional modules for standalone injector

Adds an "additionalModules" parameter to IDynamicSetupService#doSetup() so that a client can give additional modules which will be used when creating the injector for the DSL in question.

This feature is intended for use in headless builders with generators to allow the generator plug-in to supply its own Guice module.

Support strict source type ordering in any build

The IBuildSorter API allows for sorters to sort URIs into multiple groups to allow for finer tuned build ordering/precedence.

Cleanups and bug fixes

Check DSL cleanups:

• Check DSL and check configuration DSL were migrated from an inferred Ecore model to an imported ECore model.
• Unified workflows of Check and CheckCfg into a common workflow.
• Use plugin URIs for references between Ecore models

Check fixes:

• Fix check formatting of comments and contexts
• Quickfix to import a missing class was fixed
• Proper issue codes for multi-header checks. Issue codes now depend on message header only.

Format DSL fixes:

• prevent unwanted method name conversion
• Fixed generates the inner class handling of contextual formatting
  (e.g.ActivatorForColumnLocatorBefore, ParameterCalculatorForColumnLocatorBefore) to compilable names.-
• Contextual formatting rules for Xtext elements that do not have an associated ECore class but explicitly define their object creation now trigger the creation of format methods for the correct Eclasses

Format DSL runtime fixes:

• Elements that are explicitly left unformatted via format rules do not trigger any linebreak
• no_format rules do not clash with explicit No-Format annotations
• non breakable line entries are never broken (they'd rather make a line longer than the maximum)
• Nested no_format rules are correctly handled also when they are a mix of 'around' and 'between' rules
• White spaces are never added in front of non formatted elements
• All comments that disable/re-enabled formatting are now left unformatted.

Builder fixes:

• Fix inconsistency of isPrelinkingPhase flag. The change adjusts the implementation of LazyLinkingResource2 to actually set the real value for isPrelinkingPhase instead of hard-coded 'false' literal in Xtext. In order to achieve this, method's implementation had to be copied, which is not very clean, however this change should make model inference more robust.

• Include Stack Trace in the Logger when StackOverflowError is thrown. The Stack Trace is limit to the first and last 10 elements.

To simplify reintegration and releasing the missing components we also for now downgrade Xtext version used to 2.8.3.

Issues #3, #6