ondra chaloupka <> in WildFlyCore

[WFCORE-316] Enhancing auto ignored test case with --cached-dc

Adding Eclipse .checkstyle file under .gitignore

[WFCORE-316] Adding tests for --cached-dc configuration option

[WFCORE-316] Changing start method to allow not reseting host xml config

Before any start domain hosts is started with brand new configuration

(copied from defined xml template).

This change adds parameter which defines that xml config should be left

as it is - just returns name of config file - not checking if exists.

[WFCORE-316] Having wfly managed configuration a fluent api

For enhancing domain test coverage adjusting shared

WildFlyManagedConfiguration to provide a bit of fluent api