* clean up in testDatastructs
* avoid jump on unassigned mem in rxns
* set valgrind error exit code
* update suppressions
* clean up RDValue in testDict
* don't leak mol if parsing Maestro file fails
* don't leak mol if parsing PDB block fails
* cleanup leftover rxns in testReaction
* cleanup mol if CX extensions cannot be parsed
* cleanup leftover mols in smiTest1
* cleanup leftover mols in moldraw2DTest1
* cleanup leftover mols in testSubstructMatch
* make testEnumeration go easier on valgrind
* reduce R counts
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