bool check in VariableMapper to implement new functionality. Tests still failing due to missing implementation

adapted EqFct test to the mapped behaviour. Now tests are passing again, but I guess the complete adapter is still broken.

prepared test for DoocsPVFactory for Factory which uses the mapping. currently failing as implementation not complete

testVariableMapper is testing the clear function (and uses it to have a clean state for the next test)

changed signature of DoocsProcessScalar to accept a different name for the Doocs property than the PV name

factored out the actual importing into a function with a plain C++ interface so it can be used without XML file

refactoring: merged processLocationImport and processGlobalImport into one function as they were 90 % idendical

implemented tests are now checking for the correct expected values (and still failing due to missing implementation