Create/Adapt configuration for symbolic execution, add use of constraints cpa to it and make it "createable".

Execution will still throw AssertionErrors due to not implemented TransferRelation methods.



git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/symbolic@14516 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c