Removing superfluous and unused piece of code.
Moved classes I propose to deprecate to a separate module camunda-bpm-testing-deprecated. Modules / Projects wishing to use these entry points and the current style of testing for some more time to come should depend on that module. (The classes are not yet marked @Deprecated - to be discussed first)
Moved a test class to camunda-bpm-testing-deprecated - corresponding to the reasoning in previous commit 7aad67cc1234d6a082269a46f21e6026392fb847
Fixed module dependencies along the lines of introducing the temporary module camunda-bpm-testing-deprecated.
Reduced dependencies for camunda-bpm-fest-assertions to the camunda-engine library and the fest-assert-core library.
Fixed (obsolete) dependency to camunda-bpm-fluent-engine-api
Introduced two new entry point classes for assertions-only and assertions-with-some-helpers. The classes are just starting points for more development work to come.