Mem checkup (#3083)

* 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

Code/DataStructs/testDatastructs.cpp

@@ -1425,6 +1425,7 @@ void test16BitVectProps() {
     RDValue newValue;
     TEST_ASSERT(handler->read(ss, newValue));
     TEST_ASSERT(from_rdvalue<ExplicitBitVect>(newValue) == bv);
+    newValue.destroy();
   }
   delete handlers[1];
 }